Conveners
Nuclear, Particle and Radiation Physics 2
- Zinhle Buthelezi (iThemba LABS)
Nuclear, Particle and Radiation Physics 2
- Siegfried Förtsch (iThemba LABS)
Nuclear, Particle and Radiation Physics 2
- Bruce Mellado (University of the Witwatersrand)
Nuclear, Particle and Radiation Physics 2
- Thomas Dietel (University of Cape Town)
Nuclear, Particle and Radiation Physics 2
- Deepak Kar (University of Witwatersrand)
Nuclear, Particle and Radiation Physics 2
- Simon Connell (University of Johannesburg)
Nuclear, Particle and Radiation Physics 2
- Simon Connell (University of Johannesburg)
Mr
Robert Reed
(University of Witwatersrand)
04/07/2017, 10:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The LHC began Run II operations in the second half of 2015. This is the first physics run since the discovery of the Higgs boson in 2012 and opens the door to new physics beyond the standard model. Recent results based on the 2015 and 2016 data include the measurement of the fiducial, differential and production cross sections of the Standard Model (SM) Higgs boson of mass 125.09 GeV as well...
Ms
Shell-may Liao
(University of the Witwatersrand, School of Physics, 1 Jan Smuts Avenue, Braamfontein, Johannesburg, 2000, South Africa”)
04/07/2017, 10:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The results of a search for new phenomena in events with missing transverse energy (MET) and a Higgs boson decaying to two photons are presented. Data from proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 36.1 fb-1 have been collected with the ATLAS detector at the LHC in 2015 and 2016. The results of this search are...
Mrs
Chilufya Mwewa
(University of Cape Town)
04/07/2017, 11:10
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The Large Hadron Collider (LHC), the largest hadron accelerator ever built, began operations in 2009 at centre-of-mass energies of 0.9, 7 and 8 TeV (Run I). After a long shutdown (LS1) of two years (2013-2014), the LHC resumed operations in 2015 (Run II) at a centre-of-mass energy of 13 TeV and reached a record luminosity of 1.37 x 10^34 cm-2 s-1, exceeding its design luminosity of 10^34 cm-2...
Mr
Kehinde Tomiwa
(University of the Witwatersrand)
04/07/2017, 11:30
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The missing transverse momentum in the ATLAS experiment is the momentum imbalance in the plane transverse to the beam axis. That is the resultant of the negative vectorial sum of the momenta of all particles that are involved in the proton-proton collision. A precise measurement of the missing transverse energy is essential for many physics studies at the LHC, such as Higgs boson measurements,...
Ms
Raynette van Tonder
(University of Cape Town)
04/07/2017, 11:50
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Vector Boson Scattering (VBS) has been identified as a promising process to study the nature of electroweak symmetry breaking. The best channel for VBS measurements is same-electric-charge W boson scattering: a rare Standard Model process that has a distinctive experimental signature of a same-electric-charge lepton pair and two high energy forward jets. The study of the electroweak production...
Dr
Zinhle Buthelezi
(iThemba LABS)
04/07/2017, 14:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Heavy quarks are produced in hard parton scatterings in the initial stages of hadronic collisions and are important tools for studying various aspects of QCD. Heavy-quark measurements as a function of multiplicity give insight into processes influencing their production in hadronic collisions at LHC energies. Also, they provide a way to test the possible influence of multi-parton interactions....
Deepak Kar
(University of Witwatersrand)
04/07/2017, 14:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
By measuring the substructure of a jet, one can assign it a quark or gluon tag. In this talk, we confront the challenges faced when going beyond this leading-order understanding, using both parton shower generators and first-principles calculations to assess the impact of higher-order perturbative and nonperturbative physics. Working in the idealised context of electron-positron collisions,...
Dr
Mukesh Kumar
(University of the Witwatersrand)
04/07/2017, 14:40
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
We study the signature of beyond Standard Model (BSM) scalar bosons through multi-lepton final states. In here we consider H > Sh decay modes, with mass of BSM scalars 250 <= m_H <= 300 GeV and 140 <= m_S <= 160 GeV and the mass of SM Higgs boson m_h = 125 GeV. In particular S and h allowed to decay in all possible modes, where we analyse only same/opposite - sign/flavour leptons for the study.
Dr
Siegfried Förtsch
(iThemba LABS)
04/07/2017, 15:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The Quark Gluon Plasma (QGP), characterized by high temperature and density, is a state of strongly interacting matter in which the constituents of hadronic matter, the quarks and gluons, are no longer confined. Some of the most sensitive probes of the QGP are charmonia and bottomonia, which are bound states of charm–anticharm (c-c̅) or bottom–antibottom (b-b̅) quarks, respectively. Early...
Dr
AMAL SARKAR
(NRF iThemba LABS, Cape Town)
04/07/2017, 15:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The production of electroweak W± and Z0 bosons is extensively studied at the CERN Large Hadron Collider (LHC) because they are important benchmarks of the Standard Model. Due to their masses, they are produced in hard scattering processes occurring at the early stage of a collision and they interact weakly, therefore, they are not affected by the strong interaction....
Mr
Stefan von Buddenbrock
(University of the Witwatersrand)
05/07/2017, 10:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The Madala hypothesis is the prediction of a new heavy scalar, the Madala boson, that has had previous success in explaining several anomalies in LHC Run 1 and 2 data. In the literature, the Madala boson has so far primarily been discussed in the context of its dominant production mode, gluon fusion. However, it can be shown that a study of its production in association with top quarks can...
Mr
Abdualazem Fadol
(University of the Witwatersrand)
05/07/2017, 10:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Data reported by the ATLAS and CMS experiments at the Large Hadron Collider (LHC) involving final states with two charged leptons (electrons or muons) and missing energy is studied. These data are analysed in terms of the production of a heavy boson, H, decaying into the Higgs boson, h, and an additional scalar mediator, S. The mass of H is assumed to be around 270 GeV and the mass of S lies...
Mr
Tshidiso Molupe
(University of the Witwatersrand)
05/07/2017, 11:10
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The search for the discovery potential at the LHC of a high-mass right handed (RH) gauge boson WR which decays to a heavy neutrino and a lepton. The neutrinos that are produced are highly boosted and subsequently decay via off-shell WR boson to jets and a lepton (N→ljj). The decay products are highly collimated, formi ng a single neutrino jet. The focus is on the regime where the WR is very...
Mr
Phineas Ntsoele
(University of Johannesburg)
05/07/2017, 11:50
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The Standard Model (SM) is known to be incomplete (it cannot explain dark matter, dark energy, gravitational waves, matter-antimatter asymmetry, etc). The introduction of a Dark Sector via an additional U(1)D gauge symmetry added to the SM Lagrangian could be the long-awaited solution. In this model there is a dark vector boson Zd which can mix with the SM hypercharge...
Mr
Robert Hambrock
(University of Cape Town)
05/07/2017, 14:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
We compute the suppression, angular, and rapidity distribution of single open heavy flavour and the momentum, angular, and rapidity correlations for pairs of open heavy flavour at RHIC and LHC from an AdS/CFT-based energy loss model. We quantitatively compare these strongly-coupled QGP predictions to the weakly-coupled QGP predictions of Nahrgang et al., PRC90 (2014) [arXiv:1305.3823]. In the...
Mr
Mampionona Ralaimiaramanana RAJAOFERASON
(Wits University)
05/07/2017, 14:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The production of four isolated charged leptons (electrons or muons) constitute a clean signature in proton-proton collisions provided by the Large Hadron Collider. A heavy scalar, H, with a mass around 270 GeV is considered as a scenario for the anomalous production of for leptons. The heavy scalar can decay directly into four leptons via the decay into two Z bosons. Another option is the...
Ms
Joyful Mdhluli
(University of the Witwatersrand)
05/07/2017, 14:40
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Composite scintillators are new promising detectors for use in severe radiation environments. They consist of crystal granules embedded into an optical transparent medium. This ensures a high radiation hardness within the scintillator with comparison to normal plastic scintillators. However, composite scintillators are low opacity materials as a result of the light scattered by the small...
Ms
Debarati Roy
(Postdoc at Wits)
05/07/2017, 15:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Increase energy in LHC drives us to perform exotic searches in the kinematic regions unreachable before. Being a hadron collider it is utterly important to explore the LHC physics with the detailed understanding of the performance of jets, direct manifestations of hadrons as produced in significant number from proton proton interactions. It is most likely that newly reached higher energy can...
Prof.
Bruce Mellado
(University of the Witwatersrand)
06/07/2017, 10:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
With the discovery of a Higgs boson at the Large Hadron Collider (LHC) new opportunities have open for the field of collider physics. The study of the couplings of this Higgs boson to other particles and the search for new bosons have become a focus. Based on features of the data collected by experiments at the LHC during Run 1 (until the end of 2012) the hypothesis of a new boson was...
Mr
Victor Gueorguiev
(University of Cape Town)
06/07/2017, 10:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
We present first results on the ability to constrain the gluon content of relativistic nuclei through novel light and heavy flavor jet and open heavy flavor observables at a future electron-ion collider (EIC), a \$1 billion dollar facility to be built in the United States. Using massive supercomputer processing, we compare predictions from a complete next-to-leading order Monte Carlo hard...
