PKU-SJTU Collider Physics Forum for Junior Scholars (京沪云坛 No.14): The tau lepton studies at the ATLAS

by Dr Boping Chen (Tel Aviv University)

Friday 30 Sep 2022, 19:00 → 20:30 Asia/Shanghai

Online (Cloud)

STJU indico cross-reference: https://indico-tdli.sjtu.edu.cn/event/1294/

Zoom Meeting: 654 9258 0479 (Passcode: 839455)

 

Biography:
Dr. Boping Chen is a postdoctoral fellow working on the ATLAS experiment at Tel Aviv University. He
obtained his Ph.D. degree in December 2020 from Iowa State University. His thesis topic was searching
for a heavy resonance decaying into a standard model Higgs boson and a photon. Since January 2020,
he has joined the ATLAS tracking group and worked on the task of optimizing and re-training the
pixel Neural Network to improve pixel cluster splitting. At Tel Aviv University, he is contributing to the
ATLAS phase II tau trigger upgrade study, the validation for a novel low pT boosted di-tau tagger,
and an analysis searching for Higgs boson decays into two a-bosons with subsequent decays to
photons and hadronic taus.

 

Abstract:
Final states that include hadronically decaying tau leptons are important in many analyses of the
ATLAS experiment, such as measurements of Standard Model processes, Higgs boson searches, and
searches for new physics phenomena. These analyses depend on robust tau reconstruction and
excellent particle identification algorithms that provide suppression of backgrounds from jets,
electrons and muons. In this talk, I will review the ATLAS single tau reconstruction algorithm, and
introduce a novel boosted low pT boosted di-tau tagger. Besides, I will talk about the possibility of
“Online Machine Learning”, implementing the machine learning model to the hardware trigger to
improve the tau trigger performance.

PKU-SJTU-BopingChen.pdf