Speaker
Description
This paper presents the search for the Higgs boson, with mass 125GeV, decaying to two new intermediate states and then into four lepton final states, H → ZdZd → 4l together with the search for a double Zd1 and Zd2 hypothesis. The analysis is conducted using the Run II data set from pp collisions collected with the ATLAS detector corresponding to a total integrated luminosity of 140fb−1 at a centre of mass energy of √s = 13TeV. A study on modifying the signal region has also been conducted, assuming a broader width on the Zd. Based on the signal and background models, the total number of expected events is 14, while 19 events were observed in the modified signal region. The results are compatible with Standard Model predictions. The search for the double hypothesized Zd1 and Zd2 is performed in the medium signal region. For this study, clustering algorithms and azimuthal integration are used to find the hypothesized Zd1 and Zd2 vector boson masses. Particular emphasis is also given to the limit setting procedure used in this analysis. In addition, the procedure used to port the limit setting code from CPU to GPU is reviewed together with the performance of the modified machinery.
Apply to be considered for a student ; award (Yes / No)?
Yes
Level for award;(Hons, MSc, PhD, N/A)?
MSc
