10 years after Higgs discovery, we are building a new detector

by Dr Hualin Mei (University of California, Santa Barbara)

Tuesday 21 Feb 2023, 14:00 → 15:00 Asia/Shanghai

ONLINE

Abstract

The Higgs boson has been discovered by the ATLAS and CMS collaborations in 2012 at the Large Hadron Collider (LHC). Over the last 10 years, its properties have been extensively measured, including its mass, spin-parity and coupling to massive gauge bosons (W, Z), most massive quarks and charged lepton (top, bottom, tau lepton), which are all consistent with the Standard Model (SM) predictions. Among other untested properties, the Higgs couples to 2nd generation fermions and Higgs-self coupling are the next important ones to test, but require a much larger dataset than what has been currently recorded during LHC Run 1 and Run 2. To provide more data, the high luminosity LHC (HL-LHC) has been planned to start operation in 2029, which imposes several challenges to the current detector. The CMS experiment is currently under-going a series of upgrades to cope with the high data rate and harsh concurrent collision conditions at HL-LHC. In this talk, I will briefly summarize a few selected highlights of the Higgs boson properties measurements using the CMS detector, and use the endcap muon system of CMS to introduce how the experiment is going to handle the exciting challenges to come.

 

Biography

Dr. Hualin Mei is a postdoctoral scholar from University of California, Santa Barbara, working on the CMS and milliQan experiments. He obtained his Ph.D. degree in 2018 from University of Florida, and B.S. degree in 2012 from Wuhan University. His research interests in CMS include properties measurements of the Higgs boson, search for BSM physics using the Higgs boson as a tool. He is currently the co-convener of the CMS Higgs to diphoton physics analysis group. He has also made important contributions to CMS's endcap muon system since 2013 in various aspects including operation, performance study, local reconstruction, DAQ electronics upgrade and its software/firmware developments. He is also a member of the milliQan experiment, participated in the construction and commissioning of the Run 3 detectors, and led the developments of DAQ and on-line monitoring of the experiment.

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