BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Optic Fibre Sensors for Temperature Sensing in Pressurized Water R eactors DTSTART;VALUE=DATE-TIME:20210727T133000Z DTEND;VALUE=DATE-TIME:20210727T134500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7055@events.saip.org.za DESCRIPTION:Speakers: Bongani Maqabuka (University of Johannesburg)\nhttps ://events.saip.org.za/event/206/contributions/7055/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7055/ END:VEVENT BEGIN:VEVENT SUMMARY:Multi-photon decay mode spectroscopy of positronium DTSTART;VALUE=DATE-TIME:20210726T104500Z DTEND;VALUE=DATE-TIME:20210726T110000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7054@events.saip.org.za DESCRIPTION:Speakers: Storm Johnson (University of Cape Town)\nhttps://eve nts.saip.org.za/event/206/contributions/7054/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7054/ END:VEVENT BEGIN:VEVENT SUMMARY:Investigation of limit of detection using standard radioactive sou rces with a LaBr3(Ce) detector DTSTART;VALUE=DATE-TIME:20210726T103000Z DTEND;VALUE=DATE-TIME:20210726T104500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7053@events.saip.org.za DESCRIPTION:Speakers: Ferdie van Niekerk ()\nhttps://events.saip.org.za/ev ent/206/contributions/7053/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7053/ END:VEVENT BEGIN:VEVENT SUMMARY:Activity Concentration Measurement of Naturally-Occurring Radionuc lides in Various Vegetation plots in Rustenburg\, North-West Province\, So uth Africa DTSTART;VALUE=DATE-TIME:20210726T093000Z DTEND;VALUE=DATE-TIME:20210726T094500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7048@events.saip.org.za DESCRIPTION:Speakers: Peter Olagbaju (North West University\, South Africa )\nhttps://events.saip.org.za/event/206/contributions/7048/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7048/ END:VEVENT BEGIN:VEVENT SUMMARY:Connecting multi-lepton anomalies at the LHC and Astrophysical obs ervations DTSTART;VALUE=DATE-TIME:20210729T103000Z DTEND;VALUE=DATE-TIME:20210729T104500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7280@events.saip.org.za DESCRIPTION:Speakers: Elias Malwa (Wits HEP Group)\nThe connection between the multi-lepton anomalies at the Large Hadron Collider and astrophysics can be described by a two Higgs doublet model with an additional singlet s calar (2HDM+S). We make studies on the interaction mechanism of singlet S to dark matter. This is achieved from the annihilation of Dark Matter (D M). We demonstrate that using this model we could also describe the excesses in gamma-ray flux from the galactic centre and the cosmic-ray spectra from AMS-02. Moreover\, this study provides indirect searches for new bosons that have never been performed before at the LHC\, namely the search for H→SS\,S→invisible and S decaying into other par ticles.\n\nhttps://events.saip.org.za/event/206/contributions/7280/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7280/ END:VEVENT BEGIN:VEVENT SUMMARY:Quark versus Gluon Jet Tagging DTSTART;VALUE=DATE-TIME:20210730T094500Z DTEND;VALUE=DATE-TIME:20210730T100000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7267@events.saip.org.za DESCRIPTION:Speakers: Tasnuva CHOWDHURY (University of the Witwatersrand\, Johannesburg)\nClassifying a jet initiated from quarks or gluons based on its substructure is one of the most challenging problems at the LHC. The difference in the color structure of quarks and gluons can reflect in the amount of energy loss or the pattern of radiated energy of a jet originate d from quarks or gluons. The low-level detector output can be used to iden tify parton jets using Machine learning techniques. Here we will present t he performance of the existing quark versus gluon jet tagger in the ATLAS experiment for RUN 2 data with a 60% efficiency for selecting a quark-init iated jet. We will also present preliminary studies for a new forward tagg er using the ATLAS calorimeter where the granularity is coarse.\n\nhttps:/ /events.saip.org.za/event/206/contributions/7267/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7267/ END:VEVENT BEGIN:VEVENT SUMMARY:Statistical correlations impacting a top quark mass measurement in 13 TeV proton-proton collision data from the ATLAS detector DTSTART;VALUE=DATE-TIME:20210730T093000Z DTEND;VALUE=DATE-TIME:20210730T094500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7308@events.saip.org.za DESCRIPTION:Speakers: Kevin Nicholas Barends (University of Cape Town)\nTh e top quark is the heaviest particle in the standard model and reducing th e uncertainty of the top quark mass directly speaks to/ affects precision tests of the consistency of the standard model\, where breaks from this co nsistency would point to the existence of more massive particles. Since th e top quark decays before hadronizing\, either the kinematic properties of the decay products or measurements of the rate of the top quark productio n have been used to measure the mass of the top quark. The majority of mea surements consider various decay modes of the W boson with no specificatio n on the decay of the b-quark when utilizing the kinematic properties of t he decay products. These measurements are predominantly limited by uncerta inties related to the reconstruction of jets. However\, there is a top qua rk decay mode which are largely independent of the aforementioned uncertai nty but require large amounts of data due to their low production rate. Th is decay mode includes a $J/\\psi$ meson originating from a b-hadron and a semi-leptonic decay of the W boson. The invariant mass of the $J/\\psi$ m eson and lepton is sensitive to the top quark mass. This paper describes a maximum likelihood approach to extract the top quark mass from a probabil ity density function\, pdf\, while studying the impact of the correlations between each of the pdf parameters.\n\nhttps://events.saip.org.za/event/2 06/contributions/7308/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7308/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for a heavy pseudo-scalar decaying into a $Z$ boson and ano ther heavy scalar boson leading to four lepton final states in $pp$ colli sions at $\\sqrt{s}$ = 13~TeV with the ATLAS detector DTSTART;VALUE=DATE-TIME:20210727T141500Z DTEND;VALUE=DATE-TIME:20210727T143000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7262@events.saip.org.za DESCRIPTION:Speakers: Onesimo Mtintsilana (University of Witwatersrand)\nA search for a heavy resonance pseudo-scalar\, A\, decaying into a $Z$ boso n and another heavy scalar boson\, $H$\, is carried out at the LHC using a data sample corresponding to an integrated luminosity of 139 fb$^{-1}$ fr om proton-proton collisions at $\\sqrt{s}$ = 13 TeV. In these studies\, th e scalars $H$ will decay to two scalars $S$ or an $S$ and a Standard Model Higgs boson $H$ via an effective model. The $A \\rightarrow Z(\\rightarro w \\ell\\ell) $ and $ H (H\\rightarrow SS $ or $Sh)$ production in at leas t four leptons final state will be examined in this search.\n\nhttps://eve nts.saip.org.za/event/206/contributions/7262/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7262/ END:VEVENT BEGIN:VEVENT SUMMARY:Upgrade of the iThemba LABS Fast Neutron Beam Facility towards ISO /IEC 17025 Accreditation DTSTART;VALUE=DATE-TIME:20210726T101500Z DTEND;VALUE=DATE-TIME:20210726T103000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7288@events.saip.org.za DESCRIPTION:Speakers: Zina Ndabeni (University of Cape Town/iThemba LABS)\ , Andy Buffler (University of Cape Town)\, Veronique Lacoste (Institut de Radioprotection et de Sûreté Nucléaire)\, Peane Maleka (iThemba LABS)\, Ralf Nolte (Physikalisch-Technische Bundesanstalt)\nThe iThemba LABS fast neutron beam facility (D-line vault) is an international niche facility t hat can provide ns-pulsed quasi-monoenergetic neutron beams in the energy range of 30 to 200 MeV. Available neutron beam facilities with energy rang e similar to this facility are described in details by the EURADOS (Europe an Radiation Dosimetry) Report [1]. The facility has remained practically unchanged since it was first built more than 30 years ago and over the yea rs\, a number of problems associated with low energy neutron backgrounds i n the vault and the stability of the proton beam on target were identified [2].\n \nAs a plan going forward and motivation for the vault development \, the National Metrology Institute of South Africa (NMISA) designated iTh emba LABS facility as an entity responsible for providing traceability for the medium and high-energy neutron measurements in South Africa. This res ulted in a formal collaboration between iThemba LABS\, University of Cape Town\, together with international partners Institute de Radioprotection e t Sûreté Nucléaire (IRSN in France)\, National Physical Laboratory (NPL in UK) and Physikalisch-Technische Bundesanstalt (PTB in Germany) to upgr ade the facility in order to achieve ISO/IEC 17025 accreditation status fo r the medium and high-energy neutron region. We present the status on the progress of the D-line vault upgrade\, including results from previous mea surements of the neutron background from the original configuration of the vault. Results from these measurements\, together with results from Monte -Carlo simulations\, were used to reconfigure the physical infrastructure of the D-line vault.\n\nReferences\n[1] Pomp S. et al.\, “High-energy qu asi-monoenergetic neutron fields: existing facilities and future needs”\ , EURADOS\, Braunschweig\, Germany\, EURADOS Rep. 2013-02 (May 2013).\n[2] Mosconi M. et al.\, "Characterisation of the High-energy Neutron Beam at iThemba LABS"\, Radiation Measurements 45\, 1342-1345 (2010).\n\nhttps://e vents.saip.org.za/event/206/contributions/7288/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7288/ END:VEVENT BEGIN:VEVENT SUMMARY:The derivation of preliminary reference levels for radioactivity i n drinking water surrounding authorised sites. DTSTART;VALUE=DATE-TIME:20210726T100000Z DTEND;VALUE=DATE-TIME:20210726T101500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7246@events.saip.org.za DESCRIPTION:Speakers: Thato Molokwe (National Nuclear Regulator)\nThe Nati onal Nuclear Regulator's (NNR) mandate is to protect the people\, property and environment from radiological damage. NNR is currently involved in pr ojects to establish the radioactivity of drinking water in the vicinity of authorised sites. It is important that before this\, preliminary referenc e levels which will be used to assess the radioactivity levels in collecte d samples are established. These reference levels will inform whether the water resource from which the samples were collected poses a radiological threat to human health if ingested. The study seeks to derive preliminary reference levels based on international best practices. Annual Limit on In take (ALI) was calculated making use of the principles of the World Health Organisation (WHO) which is considered to be international best practice. The calculations factored in different age groups and made use of dose co nversion factors provided by the International Atomic Energy Agency (IAEA) in the General Safety Regulations (GSR Part 3). Calculated ALI values for infant\, child and adult age groups are presented. The results suggest an insignificant (orders of magnitude) difference in calculated ALI values a cross ages. Therefore it is recommended that the NNR use calculated ALI fo r adults as preliminary reference levels. These can be used in assessing t he radioactivity status of baseline data that is currently being collected .\n\nKeywords: Drinking water\, radioactivity\, reference levels\n\nhttps: //events.saip.org.za/event/206/contributions/7246/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7246/ END:VEVENT BEGIN:VEVENT SUMMARY:A search for a high-momentum high-mass neutrino in $pp$ collisions with the ATLAS detector DTSTART;VALUE=DATE-TIME:20210727T094500Z DTEND;VALUE=DATE-TIME:20210727T100000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7271@events.saip.org.za DESCRIPTION:Speakers: Mvelo Dhlamini (University of the Witwatersrand)\nOn e indication that the Standard Model of particle physics is incomplete lie s in the unanswered question of neutrino mass generation. Most popular amo ng the possible explanations of this mystery is the see-saw mechanism whic h postulates that small neutrino masses arise from the exchange of heavy f orce-carriers. Additionally\, a framework for this mechanism is the so-cal led Left-Right Symmetric Model (LRSM) which is favoured since it offers a number of advantages such as explanations for violation of parity in the S tandard Model\, generation of mass in both heavy and light neutrinos\, and accounts for parity symmetry at high energies. This model can be analysed through studying lepton-number violation\, of which the Keung-Senjanovi\\ 'c process is a culprit. The search herein investigates the decay of a hea vy right-handed gauge boson $W_R$ into a heavy neutrino $N_R$ via the afor ementioned process\, with keen focus on regions where the gauge boson $W_R $ is much heavier than the boosted neutrino $N_R$. The basis of the search is Run 2 data collected during the years 2015 to 2018\, from the ATLAS de tector at the Large Hadron Collider (LHC). For such a search\, muon and el ectron channels result in different topologies\; in the former\, a unique method of large-radius jets containing electrons is employed.\n\nhttps://e vents.saip.org.za/event/206/contributions/7271/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7271/ END:VEVENT BEGIN:VEVENT SUMMARY:An Investigation of overtraining within Semi-Supervised Machine Le arning Models in the search for heavy resonances at the LHC DTSTART;VALUE=DATE-TIME:20210730T104500Z DTEND;VALUE=DATE-TIME:20210730T110000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7249@events.saip.org.za DESCRIPTION:Speakers: Benjamin Lieberman (University of Witwatersrand)\nWh en utilizing semi-supervised techniques in training machine learning model s in the search for bosons at ATLAS\, the overtraining of the model must b e investigated. In particle physics internal fluctuations of the phase spa ce and bias in training can cause semi-supervised models to label false si gnals within the phase space due to overfitting. The issue of false signal generation in semi-supervised models has not been fully analyzed and ther efore utilizing a toy Monte Carlo model\, the probability of such situatio ns occurring can be quantified. This investigation of Zgamma resonances is performed using a pure background Monte Carlo sample. Through unique pure background samples extracted to mimic ATLAS data in a background-plus-sig nal region\, multiple runs enable the probability of these fake signals oc curring due to overtraining to be thoroughly investigated.\n\nhttps://even ts.saip.org.za/event/206/contributions/7249/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7249/ END:VEVENT BEGIN:VEVENT SUMMARY:Machine learning approach for the search of resonances with topolo gical features at the Large Hadron Collider DTSTART;VALUE=DATE-TIME:20210730T103000Z DTEND;VALUE=DATE-TIME:20210730T104500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7274@events.saip.org.za DESCRIPTION:Speakers: Salah-eddine Dahbi (University of Wits)\nWe propose a new approach to search for new resonances beyond the Standard Model (SM) of particle physics in topological configurations using Machine Learning techniques. This involves a novel classification procedure based on a comb ination of weak-supervision and full-supervision in conjunction with Deep Neural Network algorithms. The performance of this strategy is evaluated o n the production of SM Higgs boson decaying to a pair of photons inclusive ly and exclusive regions of phase space\, for specific production modes at the Large Hadron Collider (LHC)\, namely through the gluon-gluon fusion\, the fusion of weak vector bosons\, in associated production with a weak v ector boson\, or in association with a pair of top quarks. After v erifying the ability of the methodology to extract different Higgs sig nal mechanisms\, a search for new phenomena in high-mass diphoton final st ates is setup for the LHC.\n\nhttps://events.saip.org.za/event/206/contrib utions/7274/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7274/ END:VEVENT BEGIN:VEVENT SUMMARY:Anomaly detection with Data Quality Early Warning Systems in ATLAS using machine learning DTSTART;VALUE=DATE-TIME:20210730T100000Z DTEND;VALUE=DATE-TIME:20210730T101500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7292@events.saip.org.za DESCRIPTION:Speakers: Senzo Msutwana ()\nIn this project\, ideas for the i mplementation of a data-quality early warning system (DQEWS) are explored. The DQEWS project aims to use supervised machine learning (ML) methods to evaluate data-quality from the ATLAS detector for each sequential luminos ity-block over the course of a run. The idea is to then\nmake use of featu re extraction from the results of the classification procedure in order to determine which of these features in the data-sets can reliably indicate problems in the detector\, while accounting for expected differences in di stributions as the beam intensity reduces over the course of a run. In pri nciple\, it is these features which may point experts to issues further do wn in the DAQ process which may be resulting in this drift during a run of the detector. This is\, in essence\, an exploration of an idea for a data -quality monitoring\nsystem for the ATLAS detector. Within the scope of th is project thus far\, the following have been shown. Firstly\, the use of gradient boosted decision trees (GBDTs) are preferable to deep neural netw orks (DNNs). This is due to DNNs requiring more computational power than G BDTs to backpropagate through the trained\nmodels’ internal weights in o rder to rank the features used in classification. Secondly\, differences i n datasets have been shown with the training of the GBDTs\, and are shown to increase with comparisons of LB data further apart from the initiation of a run of the detector.\n\nhttps://events.saip.org.za/event/206/contribu tions/7292/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7292/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for dark-sector showering in ATLAS using semi-visible jets DTSTART;VALUE=DATE-TIME:20210727T103000Z DTEND;VALUE=DATE-TIME:20210727T104500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7265@events.saip.org.za DESCRIPTION:Speakers: Sukanya Sinha (The University of Witwatersrand)\nRec ent studies in particle physics have shown that there are myriad possibili ties for strong dark sector studies at the LHC. One signature is the case of semi-visible jets\, where parton evolution includes dark sector emissio ns\, resulting in jets overlapping with missing transverse energy. Owing t o the unusual MET-along-the-jet event topology\, this is yet an unexplored domain within ATLAS. In this talk\, I will discuss my ongoing ATLAS searc h\, focussing on the performance and optimisation challenges associated wi th such a unique final state\, specifically looking at the angle differenc e between the hardest jet and the missing transverse energy\, and targetin g a cut-and-count strategy.\n\nhttps://events.saip.org.za/event/206/contri butions/7265/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7265/ END:VEVENT BEGIN:VEVENT SUMMARY:The use of Semi-Supervision in the search for heavy resonances wit h the Zγ final state DTSTART;VALUE=DATE-TIME:20210730T101500Z DTEND;VALUE=DATE-TIME:20210730T103000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7255@events.saip.org.za DESCRIPTION:Speakers: Nalamotse Joshua Choma (Wits University)\nUnlike sup ervised learning which is known to assume a full knowledge of the underlyi ng model\, semi-supervised learning\, weak supervision in particular allow s with partial knowledge to extract new information from the data. The obj ective of this study is to set up the search for heavy resonances at the e lectroweak scale with topological requirements. These resonances could be produced with different production mechanisms. In this case we will be foc using on the searches for new resonances in the Zγ final state using weak supervised learning approach. This will then be compared to the performan ce of the full supervision approach.\n\nhttps://events.saip.org.za/event/2 06/contributions/7255/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7255/ END:VEVENT BEGIN:VEVENT SUMMARY:The anatomy of the multi-lepton anomalies at the LHC and the poten tial connection with other anomalies DTSTART;VALUE=DATE-TIME:20210729T104500Z DTEND;VALUE=DATE-TIME:20210729T110000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7266@events.saip.org.za DESCRIPTION:Speakers: Bruce Mellado (University of the Witwatersrand)\nIn this presentation an account of the multi-lepton (electrons and muons) ano malies at the LHC will be given. These include the excess production of op posite sign leptons with and without $b$-quarks\, including a corner of th e phase-space with a full hadronic jet veto\; same sign leptons with and w ithout b-quarks\; three leptons with and without $b$-quarks\, including al so the presence of a $Z$. Excesses emerge in corners of the phase space wh ere a range of SM processes dominate\, indicating that the potential mismo deling of a particular SM process is unlikely to explain them. A procedure is implemented that avoids parameter tuning or scanning the phase-space i n order to nullify potential look-else-where effects or selection biases. The internal consistency of these anomalies and their interpretation in th e framework of a simplified model will be presented. Implications on the SM Higgs boson measurements\, the muon g-2\, astrophysics and other potent ial deviations from the Standard Model will be discussed.\n\nhttps://event s.saip.org.za/event/206/contributions/7266/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7266/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for a heavier Higgs like boson and a dark force boson usin g ATLAS experiment results DTSTART;VALUE=DATE-TIME:20210729T131500Z DTEND;VALUE=DATE-TIME:20210729T133000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7295@events.saip.org.za DESCRIPTION:Speakers: Xola Mapekula (University of Johannesburg)\nThis pap er presents the search for the Higgs boson\, with mass 125GeV\, decaying t o two new intermediate states and then into four lepton final states\, H → ZdZd → 4l together with the search for a double Zd1 and Zd2 hypothes is. The analysis is conducted using the Run II data set from pp collisions collected with the ATLAS detector corresponding to a total integrated lum inosity of 140fb−1 at a centre of mass energy of √s = 13TeV. A study o n modifying the signal region has also been conducted\, assuming a broader width on the Zd. Based on the signal and background models\, the total nu mber of expected events is 14\, while 19 events were observed in the modif ied signal region. The results are compatible with Standard Model predicti ons. The search for the double hypothesized Zd1 and Zd2 is performed in th e medium signal region. For this study\, clustering algorithms and azimuth al integration are used to find the hypothesized Zd1 and Zd2 vector boson masses. Particular emphasis is also given to the limit setting procedure u sed in this analysis. In addition\, the procedure used to port the limit s etting code from CPU to GPU is reviewed together with the performance of t he modified machinery.\n\nhttps://events.saip.org.za/event/206/contributio ns/7295/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7295/ END:VEVENT BEGIN:VEVENT SUMMARY:Simplified Template Cross Section measurements of the V(H->bb) pro cess with the ATLAS detector at sqrt(s)=13 TeV DTSTART;VALUE=DATE-TIME:20210729T141500Z DTEND;VALUE=DATE-TIME:20210729T143000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7303@events.saip.org.za DESCRIPTION:Speakers: Ryan Atkin (University of Cape Town)\nPresented are the studies of the production of the Standard Model Higgs boson in associa tion with a $W$ or $Z$ boson\, where the Higgs decays to $b\\bar{b}$ and t he $W/Z$ bosons decay leptonically. The $H\\rightarrow b\\bar{b}$ decay ha s a branching fraction of $\\sim58\\%$\, so this study allows the probing of the dominant Higgs decay mode\, as well as providing the best sensitivi ty to the $WH$ and $ZH$ production modes and allowing the study of the Hig gs at high transverse momentum. These points are important for the interpr etation of the Higgs measurements in Effective Field Theories (EFTs). Sinc e $b$-hadrons are the only down-type hadrons that can be effectively tagge d\, this decay mode also allows the study of the Yukawa coupling of the Hi ggs boson to the down-type quarks.\\\\\nThe full Run-2 dataset\, correspon ding to 139 fb$^{-1}$ of instantaneous luminosity\, was collected in proto n-proton collisions with the ATLAS detector at a centre of mass energy of $\\sqrt{s}=13$ TeV. The cross-sections of this process were measured using the Simplified Template Cross Section (STXS) method. Here\, the cross sec tions are measured as a function of the $W/Z$ boson transverse momentum in different fiducial volumes based on kinematic cuts. Results of both the r esolved (where each $b$-jet is reconstructed as a separate jet) and the bo osted (where the two $b$-jets are reconstructed as one fat jet) analyses a re shown\, as well as the future prospects of the combination of these two different methods.\n\nhttps://events.saip.org.za/event/206/contributions/ 7303/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7303/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for a heavy di-photon resonance in association with b-jets with the ATLAS detector at the LHC DTSTART;VALUE=DATE-TIME:20210729T140000Z DTEND;VALUE=DATE-TIME:20210729T141500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7300@events.saip.org.za DESCRIPTION:Speakers: Esra Shrif (University of the Witwatersrand)\nWe sea rch for a heavy resonance decaying into diphoton in association with at le ast one b jet. The search uses Run II proton-proton collision data with an integrated luminosity of 139~fb^{−1} recorded by the ATLAS experiment a t a centre-of-mass energy of \\sqrt{s} = 13~TeV during 2015 to 2018 at the Large Hadron Collider. Three models are tested in this final state. A Hig gs boson like heavy scalar X produced with top quarks\, b quarks or Z boso n decaying into b\\bar{b} are examined. In this Analysis\, we setup limits on production cross-section times branching ratio on these models for the resonance mass ranging from 180~GeV–1.5~TeV.\n\nhttps://events.saip.org .za/event/206/contributions/7300/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7300/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the leptonic charge asymmetry in the tri-lepton fin al state of ttW in proton-proton collisions at a centre-of-mass energy of 13 TeV using the ATLAS detector DTSTART;VALUE=DATE-TIME:20210729T134500Z DTEND;VALUE=DATE-TIME:20210729T140000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7298@events.saip.org.za DESCRIPTION:Speakers: Cameron Garvey ()\nStudies towards a measurement of the leptonic charge asymmetry in top quark pair production in association with a W boson($t\\bar{t}W^{\\pm} $) at 13 TeV with the ATLAS experiment are presented. Previous measurements of the $t\\bar{t}W^{\\pm} $ cross-se ction have been shown to be higher than that predicted by the standard mod el indicating a potential discrepancy in the modeling of the $t\\bar{t}W^{ \\pm} $ process. This analysis aimed to study the leptonic charge asymmetr y of $t\\bar{t}W^{\\pm} $ as it provides an independent method of verifyi ng the modeling of the process and has never been measured before in $t\\b ar{t}W^{\\pm} $. The full run II data(139 $fb^{-1}$) was utilized in these studies. An event selection scheme was put in place to optimally select f or $t\\bar{t}W^{\\pm} $ events in the three-lepton final state while suppr essing background events. The leptonic charge asymmetry is calculated usin g the $\\eta$ of the top and anti-top leptons. As such a machine learning algorithm was implemented to optimally select the pair of leptons decaying from the top quarks from the total three leptons in the event. Finally\, the extraction of the leptonic charge asymmetry was implemented using a me thod known as template morphing. This analysis has remained blinded as it forms the basis of an official ATLAS analysis. Several sources of error ha ve been considered namely: cross-sections\, lepton trigger efficiencies\, and b-tagging efficiencies. The main source of uncertainty in these studie s is the limited statistics. With this in place a leptonic charge asymmetr y of $A_{C}^{\\ell} $ = $-0.08^{ +0.29}_{-0.31}$ was extracted using Asimo v data. This analysis does not have sufficient statistics to observe the l eptonic charge asymmetry at the level predicted by the standard model. How ever\, novel constraints on effective field theories may be possible and a re being investigated.\n\nhttps://events.saip.org.za/event/206/contributio ns/7298/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7298/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for the non-resonant Higgs-pair production in $\\ell^+\\ell ^-\\ell^+\\ell^-$ final state at $\\sqrt{s} = 13$ TeV in the ATLAS detecto r DTSTART;VALUE=DATE-TIME:20210729T133000Z DTEND;VALUE=DATE-TIME:20210729T134500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7296@events.saip.org.za DESCRIPTION:Speakers: Abdualazem Fadol (University of Witwatersrand)\nA se arch for the non-resonant production of a pair of the Standard Model Higgs boson $h$ via gluon-fusion\, $gg\\rightarrow hh$\, is performed. Each Hig gs boson decays to either $W^+W^-W^+W^-$\, $ZZZZ$ or $ZZW^+W^-$ leading to $4\\ell+X$ in the final state. The $\\ell$ could be an electron or a muon \, and $X$ is missing transverse energy or jets. The b-tagged as jets is v etoed in this analysis. The search uses the data at a centre-of-mass energ y of 13 TeV collected by the ATLAS detector between 2015-2018 at the Large Hadron Collider. Cut-based and multivariate analyses are used to exploit the signal.\n\nhttps://events.saip.org.za/event/206/contributions/7296/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7296/ END:VEVENT BEGIN:VEVENT SUMMARY:A search for tWZ production in the trilepton channel using Run 2 d ata from the ATLAS experiment DTSTART;VALUE=DATE-TIME:20210729T130000Z DTEND;VALUE=DATE-TIME:20210729T131500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7294@events.saip.org.za DESCRIPTION:Speakers: Benjamin Warren (University of Cape Town)\nA search for $tWZ$ production using events containing three leptons from Run 2 ATLA S proton-proton collision data with a centre of mass energy of 13 TeV will be presented. An event selection scheme was developed using simulation to select $tWZ$ events and to broadly suppress background events. Events wer e then separated into mutually-exclusive regions of phase space to increas e the amount of $tWZ$ events compared to background events\, and to calibr ate the modelling of the background production processes. Background event s were further suppressed through the use of Gradient Boosted Decision Tre e (GBDT) machine learning algorithms. First\, a GBDT was trained to identi fy hadronically-decaying $W$ bosons since these are a characteristic featu re of $tWZ$ events and help distinguish between $tWZ$ and one of the major background processes\, $WZ$. Then\, this GBDT and other event information was used to train an event-level GBDT used to distinguish between $tWZ$ a nd all backgrounds. Using the output of the event-level GBDT\, a maximum l ikelihood fit was used to estimate the signal strength\, $\\mu$\, of $tWZ$ production\, where nuisance parameters were assigned to theoretical and e xperimental systematic uncertainties. A signal strength of $\\mu = 1.80^{+ 1.88}_{-1.83}$ was determined with an expected significance of $0.55\\sigm a$\, and an expected upper limit on $\\mu$ of $3.6^{+3.1}_{-1.7}$ was also determined. The preliminary blinded results show that the search has the potential to put the strongest ever constraint on tWZ production\, but doe s not have the potential to observe tWZ production as predicted by the Sta ndard Model. These constraints are limited by statistical uncertainties\, therefore an outlook on future measurements of $tWZ$ within ATLAS will be discussed.\n\nhttps://events.saip.org.za/event/206/contributions/7294/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7294/ END:VEVENT BEGIN:VEVENT SUMMARY:Single Leptoquark Search in ATLAS DTSTART;VALUE=DATE-TIME:20210727T104500Z DTEND;VALUE=DATE-TIME:20210727T110000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7264@events.saip.org.za DESCRIPTION:Speakers: Lawrence Davou Christopher (University of the Witwat ersrand (ZA))\nThe recent anomalous magnetic moment of the muon (muon g-2) result presents a pattern of deviation from the standard model prediction in the interaction of muons with a surrounding magnetic field. A similar deviation from the standard model prediction is seen in the LHCb results o n rare B-meson decay. Plausible explanations of these anomalies are leptoq uarks. Leptoquarks when coupled with a chirality flip interaction to a hea vy quark can boost the muon's anomalous magnetic moment. This study presen ts a search for leptoquark in single production in ATLAS\, with the leptoq uark decaying into a one-light jet (b-tagged) and one lepton accompanied b y an oppositely charged lepton in the final state.\n\nhttps://events.saip. org.za/event/206/contributions/7264/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7264/ END:VEVENT BEGIN:VEVENT SUMMARY:Electronics Research Laboratory at University of Zululand: Contrib uting towards the ATLAS Experiment at CERN DTSTART;VALUE=DATE-TIME:20210726T130000Z DTEND;VALUE=DATE-TIME:20210726T131500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7263@events.saip.org.za DESCRIPTION:Speakers: Betty Kibirige (University of Zululand)\nIn December 2017\, the Executive Board of the SA-CERN Consortium approved an investme nt in the local research infrastructure at the University of Zululand. As a result\, an Electronics Research Laboratory was developed and completed in 2019. The laboratory host state of the art electronics test equipment a nd it was enhanced when the Centre for High Performance Computing (CHPC) i n Cape Town deployed a High Performance Cluster (HPC) to the institution. While it services members of the ATLAS team in South Africa who are heavil y involved in the TileCal Instrumentation upgrades at CERN\, the laborator y goes beyond just the ATLAS group to accommodate other research groups. T his presentation focuses on possible projects that can be dealt with in th is laboratory. It is to create an awareness to the Physics community\, esp ecially the Nuclear and High Energy Particle Physics groups\, on what the laboratory offers.\n\nKey words: Electronics Research Laboratory\, State o f the Art Test Equipment\, High Performance Computing.\n\nhttps://events.s aip.org.za/event/206/contributions/7263/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7263/ END:VEVENT BEGIN:VEVENT SUMMARY:Photons in Darkness DTSTART;VALUE=DATE-TIME:20210727T101500Z DTEND;VALUE=DATE-TIME:20210727T103000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7260@events.saip.org.za DESCRIPTION:Speakers: Karien du Plessis (University of the Witwatersrand)\ nSeveral astronomical observations have revealed the existence of larger m atter quantities which are thought to occupy 27% of the universe. Many hyp otheses exist about the nature of these elusive dark matter particles. One of these hypotheses predicts the existence of a hypothetical dark photon. The unique signature of this particle can be searched for at the Large Ha dron Collider (LHC) at CERN. A study is performed to determine the feasibi lity of this search in ATLAS. A theoretical model containing a vector-like quark is considered which decays into a top quark and a dark photon. The focus will be on the decay channel containing a leptonic top consisting of either an electron or muon. Signal and several background distributions f or some key variables of this decay mode will also be presented. This prop osed search could lead to detectable dark matter whilst simultaneously exp anding our limited understanding thereof.\n\nhttps://events.saip.org.za/ev ent/206/contributions/7260/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7260/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for heavy resonances in the $\\ell^+\\ell^-\\ell^+\\ell^-$ final state in association with missing transverse energy using $pp$ colli sions at $\\sqrt{s} = 13$ TeV with the ATLAS detector DTSTART;VALUE=DATE-TIME:20210727T100000Z DTEND;VALUE=DATE-TIME:20210727T101500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7259@events.saip.org.za DESCRIPTION:Speakers: Humphry Tlou (University of the Witwatersrand)\nSear ch for the presence of a new heavy resonance\, produced via gluon-gluon fu sion and decaying to the four-lepton ($4\\ell$) final state\, in associati on with missing transverse energy ($E^{\\text{miss}}_{\\text{T}}$)\, with $\\ell$ = $e$\, $\\mu$. The search uses 2015–2018 proton–proton collis ion data at $\\sqrt{s}$ = 13 TeV\, corresponding to an integrated luminosi ty of 139 fb$^{-1}$\, collected by the ATLAS detector at the Large Hadron Collider at CERN. The data is interpreted in terms of two models\, firstly the $R\\rightarrow SH \\rightarrow 4\\ell+ E^{\\text{miss}}_{\\text{T}}$\ , where $R$ is a scalar boson\, which decays to two lighter scalar bosons ($S$ and $H$). The $S$ decays to a pair of neutrinos ($E^{\\text{miss}}_{\ \text{T}}$) and the $H$ decays into $4\\ell$\, through $ZZ$ bosons. The se cond model is the $A\\rightarrow ZH \\rightarrow 4\\ell + E^{\\text{miss}} _{\\text{T}}$\, where $A$ is considered to be a CP-odd scalar which decays to a CP-even scalar $H$\, and the $Z$ boson. The $Z$ boson decays to a p air of neutrinos\, and the $H$ decays to the $4\\ell$ final state.\n\nhttp s://events.saip.org.za/event/206/contributions/7259/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7259/ END:VEVENT BEGIN:VEVENT SUMMARY:Background decomposition in $Z\\gamma$ events used in the search f or high-mass resonances. DTSTART;VALUE=DATE-TIME:20210727T093000Z DTEND;VALUE=DATE-TIME:20210727T094500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7256@events.saip.org.za DESCRIPTION:Speakers: Phuti Ntsoko Rapheeha (University of the Witwatersra nd)\nThe study present the measurement of the contribution\, purity\, of $ Z + \\gamma$ and $Z+$ jet background events in the search for high-mass $ Z\\gamma$ resonances. The study uses events were the $Z$ boson decays into a pairs of oppositely charged electrons or muons. The events used consis t of 139 fb${}^{-1}$ of proton-proton\, $pp$\, collisions data at $\\sqrt{ s} = 13$ TeV\, recorded by the ATLAS detector at the CERN Large Hadron Col lider. \nThe measured purity of $Z+\\gamma$ background events depends on t he parameter $R$ that gives the correlation between the isolation and iden tification criteria for jets faking photons in $Z+$ jet events. A data-dri ven method that uses $\\gamma\\gamma$ events collected in the same detecto r conditions as the $Z\\gamma$ events is used to determine $R$ in various bins of the photon transverse momentum or the invariant mass bins. The res ults are compared against results that are obtained using the $R$ compute d using a $Z+$jet Monte Carlo sample and a data-driven method that uses $Z +\\gamma$ events to estimate $R$.\n\nhttps://events.saip.org.za/event/206/ contributions/7256/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7256/ END:VEVENT BEGIN:VEVENT SUMMARY:Quality assurance testing of the ATLAS Tile-Calorimeter Phase-II u pgrade low-voltage power supplies DTSTART;VALUE=DATE-TIME:20210726T141500Z DTEND;VALUE=DATE-TIME:20210726T143000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7261@events.saip.org.za DESCRIPTION:Speakers: Ryan Mckenzie (University Of the Witwatersrand)\, Ed ward Nkadimeng (University of the Witwatersrand)\nThe start of the operati on of the High Luminosity LHC (HL-LHC) is planned\nfor the year 2027. The planned increase in luminosity provides the opportunity for further\nscien tific discoveries within the field of particle physics as well as many tec hnical challenges\nassociated with the new HL-LHC environment. Due to thes e environmental changes the ATLAS\nTile-Calorimeter (TileCal) is to underg o its Phase-II upgrade in 2025 in order to ensure peak\nperformance in the coming years. To this end the University of the Witwatersrand Institute f or\nCollider Particle Physics\, iThemba Labs\, and SA-CERN\, in collaborat ion with the University of\nTexas at Arlington\, are currently undertaking the development and production of approximately\n2300 Low-Voltage Power S upply (LVPS) Bricks. In order to ensure the reliable operation of\nthese B ricks on-detector an extensive quality control procedure is to be implemen ted. This\nprocedure is two-pronged in its approach. Firstly\, initial tes ting is undertaken to ensure\nvarious performance metrics such as the Bric ks output voltage are met. After which\, the\nBricks undergo Burn-in testi ng which functions to improve the reliability of the components via\naccel erated aging. Both of these processes require custom test apparatus which take the form\nof the Initial and Burn-in test stations. This presentation will provide an overview of these test\nstations including their hardware \, software\, and the certification of the Bricks before installation\nwit hin TileCal.\n\nhttps://events.saip.org.za/event/206/contributions/7261/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7261/ END:VEVENT BEGIN:VEVENT SUMMARY:Re-designing a radiation-tolerant low voltage power supply for the ATLAS Tile Calorimeter Phase-II Upgrade DTSTART;VALUE=DATE-TIME:20210726T140000Z DTEND;VALUE=DATE-TIME:20210726T141500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7258@events.saip.org.za DESCRIPTION:Speakers: Edward Nkadimeng (University of the Witwatersrand)\n Power Electronics used in high-energy physics experiments at the Large Had ron\nCollider (LHC) more specifically the ATLAS detector\, which are custo m built and have to work reliably in the presence of ionizing radiation an d an ever present magnetic field. In many such applications\, owing to cos t constraints\, Commercial Off-The-Shelf (COTS) components are often used instead of components that are radiation-hard by design. Moreover\, design complexity\, verification effort\, and scalability issues in centralized structures can impede performance improvement in monolithic designs. This talk presents the steps followed for upgrading and re-designing a radiatio n tolerant low voltage power supply for a large scale operation and the co nsiderations made for such a design. This includes measurements taken at c omponent level\, system level\, and radiation tests done using the newly u pgraded low voltage power supply\n\nhttps://events.saip.org.za/event/206/c ontributions/7258/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7258/ END:VEVENT BEGIN:VEVENT SUMMARY:Simulation of the strip sub-detector system in the new Inner Track er of the ATLAS detector DTSTART;VALUE=DATE-TIME:20210726T134500Z DTEND;VALUE=DATE-TIME:20210726T140000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7302@events.saip.org.za DESCRIPTION:Speakers: Ryan Atkin (University of Cape Town)\nIn the beginni ng of 2025\, the Large Hadron Collider (LHC) will be shutdown in order for the final upgrades to the High Luminosity LHC (HL-LHC) to commence. This will almost quadruple the amount of collisions in the LHC\, increasing the amount of data the detectors will have to deal with. Since the detectors were not designed to operate at these levels\, they will also need an upgr ade to deal with the increased radiation\, data rates and amount of partic les travelling through the detectors. One of the most extensive upgrades t o the ATLAS detector will be the replacement of the current Inner Detector (ID) with an all silicon semiconductor based Inner Tracker (ITk). However \, not only will the actual detector be upgraded\, but the simulation of t he detector will also need to be updated to match this new version. An acc urate simulation of the detector is important since this is what is used t o convert the outputs of the theoretical calculations (be it Standard Mode l (SM) or Beyond the Standard Model (BSM)) into a format that can be direc tly compared with the data coming from the experiment. Presented is some o f the work behind updating the simulation of the strip detector in the ITk \, from the sensors to the support structures and shielding components.\n\ nhttps://events.saip.org.za/event/206/contributions/7302/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7302/ END:VEVENT BEGIN:VEVENT SUMMARY:Reliability testing of the End-of-Substructure card for operation within the ATLAS Inner Tracker DTSTART;VALUE=DATE-TIME:20210726T131500Z DTEND;VALUE=DATE-TIME:20210726T133000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7278@events.saip.org.za DESCRIPTION:Speakers: Max van der Merwe (UCT)\nThis study presents the res ults of irradiation tests used to qualify the End-of-Substructure (EoS) ca rd for operation within the ATLAS Inner Tracker (ITk) at the High Luminosi ty Large Hadron Collider (HL-LHC). The EoS card is responsible for interfa cing the data\, command\, and power signals between on and off-detector el ectronics. The radiation environment within the ITk poses a challenge for electronics as energized particles are capable of upsetting the logic\, re ferred to as Single Event Upsets (SEU)\, of the constituent components\, r esulting in corrupted data. The irradiation test setup at the University o f Cape Town is outlined and the steps taken in the experiments are discuss ed. The results found indicate that one of the primary ASICs on the EoS ca rd is susceptible to SEUs under experimental conditions.\n\nhttps://events .saip.org.za/event/206/contributions/7278/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7278/ END:VEVENT BEGIN:VEVENT SUMMARY:South African contribution towards the ATLAS Tile Calorimeter PreP rocessor DTSTART;VALUE=DATE-TIME:20210726T133000Z DTEND;VALUE=DATE-TIME:20210726T134500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7252@events.saip.org.za DESCRIPTION:Speakers: Mpho Gift Doctor Gololo (Witwatersrand University)\n Four major experiments for the High Luminosity Large Hardron Collider (HL- LHC) are upgraded to accommodate an increase in luminosity. ATLAS (A Toroi dal LHC ApparatuS) is part of these four major experiments and it is upgra ded to investigate a wide range of physics. The detector is divided into l ong barrel and two extended barrels. The Tile Calorimeter (TileCal) is par t of the ATLAS detector and is the central hadronic calorimeter. The main aim of the TileCal Phase-II upgrade is to completely redesign the on- and off-detector electronics. The Tile PreProcessor (TilePPr) is part of the o ff-detector electronics and it is responsible for storing the detector dat a with a total data bandwidth of 40 Tbps. University of the Witwatersrand is contributing 24 % to the total design and production of boards toward t he TilePPr. The TilePPr is made up of numerous components and University o f the Witwatersrand is responsible for Tile GbE Switch and TileCoM compone nts.\n\nhttps://events.saip.org.za/event/206/contributions/7252/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7252/ END:VEVENT BEGIN:VEVENT SUMMARY:Application of tagged neutron method for detecting diamonds in kim berlite. DTSTART;VALUE=DATE-TIME:20210729T101500Z DTEND;VALUE=DATE-TIME:20210729T103000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7065@events.saip.org.za DESCRIPTION:Speakers: Motswakae Sebele (Botswana International University of Science and Technology)\nhttps://events.saip.org.za/event/206/contribut ions/7065/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7065/ END:VEVENT BEGIN:VEVENT SUMMARY:Validation of the Monte Carlo model for 6 and 15 MV photon beams o f VARIAN CLINAC IX Linac DTSTART;VALUE=DATE-TIME:20210729T100000Z DTEND;VALUE=DATE-TIME:20210729T101500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7064@events.saip.org.za DESCRIPTION:Speakers: KHOMBO DUMELA (STUDENT)\nhttps://events.saip.org.za/ event/206/contributions/7064/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7064/ END:VEVENT BEGIN:VEVENT SUMMARY:Transfer reactions to populate the PDR in 96Mo DTSTART;VALUE=DATE-TIME:20210729T094500Z DTEND;VALUE=DATE-TIME:20210729T100000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7063@events.saip.org.za DESCRIPTION:Speakers: Thuthukile Khumalo (Wits/iThemba LABS)\nhttps://even ts.saip.org.za/event/206/contributions/7063/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7063/ END:VEVENT BEGIN:VEVENT SUMMARY:Fine structure of the ISGMR in 90Zr\, 120Sn and 208Pb DTSTART;VALUE=DATE-TIME:20210729T093000Z DTEND;VALUE=DATE-TIME:20210729T094500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7062@events.saip.org.za DESCRIPTION:Speakers: Armand Bahini (School of Physics\, Wits)\nhttps://ev ents.saip.org.za/event/206/contributions/7062/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7062/ END:VEVENT BEGIN:VEVENT SUMMARY:Impact of Experimentally Constrained Nuclear Level Density and Pho ton Strength Function of 182Hf on the Nucleosynthesis Puzzle of 182Hf DTSTART;VALUE=DATE-TIME:20210727T140000Z DTEND;VALUE=DATE-TIME:20210727T141500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7060@events.saip.org.za DESCRIPTION:Speakers: Nomcebo Yende ()\nhttps://events.saip.org.za/event/2 06/contributions/7060/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7060/ END:VEVENT BEGIN:VEVENT SUMMARY:The scissors resonance in 151Sm DTSTART;VALUE=DATE-TIME:20210727T134500Z DTEND;VALUE=DATE-TIME:20210727T140000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7059@events.saip.org.za DESCRIPTION:Speakers: SEBENZILE PRETTY ENGELINAH MAGAGULA (IThemba Labs an d University of the Witwatersrand)\nhttps://events.saip.org.za/event/206/c ontributions/7059/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7059/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the photoabsorption cross section of 24Mg. DTSTART;VALUE=DATE-TIME:20210727T130000Z DTEND;VALUE=DATE-TIME:20210727T131500Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7056@events.saip.org.za DESCRIPTION:Speakers: Jacob Bekker (Student)\nhttps://events.saip.org.za/e vent/206/contributions/7056/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7056/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the 44Ti(alpha\,p)47V reaction rate using high-precision 50Cr(p\,t)48Cr measurements DTSTART;VALUE=DATE-TIME:20210727T131500Z DTEND;VALUE=DATE-TIME:20210727T133000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7057@events.saip.org.za DESCRIPTION:Speakers: Sifundo Binda (University of the Witwatersrand)\nhtt ps://events.saip.org.za/event/206/contributions/7057/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7057/ END:VEVENT BEGIN:VEVENT SUMMARY:Assessment of NORM in fruits and vegetables from local markets in Hartbeespoort\, Mahikeng and Pretoria DTSTART;VALUE=DATE-TIME:20210726T094500Z DTEND;VALUE=DATE-TIME:20210726T100000Z DTSTAMP;VALUE=DATE-TIME:20261005T142946Z UID:indico-contribution-414-7049@events.saip.org.za DESCRIPTION:Speakers: Veronica Gouws (Tomsk Polytechnic University)\nhttps ://events.saip.org.za/event/206/contributions/7049/ LOCATION:North-West University Potchefstroom Campus URL:https://events.saip.org.za/event/206/contributions/7049/ END:VEVENT END:VCALENDAR