Nuclear and Particle Physics Colloquium 110

(核与粒子物理学术报告会110)

Place: 沙河主楼C826

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

Speaker:  刘彦麟，美国密歇根大学

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:

  刘彦麟，先后于2012年、2018年在中国科学技术大学取得学士和博士学位。2018年10月至今在美国密歇根大学任博士后研究员。长期从事于大型强子对撞机上的ATLAS实验，在希格斯玻色子的汤川耦合和自耦合，新物理寻找，矢量玻色子散射及缪子探测器升级等研究方面取得重要成果。在Phys. Rev. Lett., Journal of High Energy Physics等国际知名期刊发表多篇文章。曾获中国物理学会高能物理分会“晨光杯”青年优秀论文一等奖，以及中科院优秀博士论文奖。