Nuclear and Particle Physics Colloquium 110

(核與粒子物理學術報告會110)

Place: 沙河主樓C826

Title:  Study on Yukawa Couplings with ttH(—>𝛾𝛾) and H—>μμ at ATLAS  

Speaker:  劉彥麟，美國密歇根大學

Abstract:

  As the last missing piece of the Standard Model (SM), the Higgs boson was discovered in 2012. Since then, study on the properties and couplings of this newly discovered particle has been one of the most important sectors at the LHC experiments. This talk will present the latest studies on the Yukawa couplings of the SM Higgs boson with 139 fb-1 data collected using the ATLAS detector at a center-of-mass energy of 13 TeV. A first direct probe of CP violation in the top-quark Yukawa coupling using events where the Higgs boson is produced in association with two top quarks, and decays into two photons will be discussed, and the most stringent exclusion on the CP-odd component in the top-quark Yukawa interaction will be presented. Besides, as a probe of the Higgs Yukawa coupling to the second generation of fermions, the search for SM Higgs boson decays into two muons is performed, and the most sensitive results to date at ATLAS will be shown.

Refs.: Phys. Rev. Lett. 125 (2020) 061802, Phys. Lett. B 812 (2021) 135980, Phys. Rev. Lett. 119 (2017) 051802 (Editors’ Suggestion)

About speaker:

  劉彥麟，先後于2012年、2018年在中國科學技術大學取得學士和博士學位。2018年10月至今在美國密歇根大學任博士後研究員。長期從事于大型強子對撞機上的ATLAS實驗，在希格斯玻色子的湯川耦合和自耦合，新物理尋找，矢量玻色子散射及缪子探測器升級等研究方面取得重要成果。在Phys. Rev. Lett., Journal of High Energy Physics等國際知名期刊發表多篇文章。曾獲中國物理學會高能物理分會“晨光杯”青年優秀論文一等獎，以及中科院優秀博士論文獎。