High Energy Physics Seminar

Precise measurements of the properties of the Higgs boson, especially the strength of its coupling to other particles and to itself, are becoming increasingly important at the Large Hadron Collider (LHC), not only to confirm the predictions made by the Standard Model but also to search for indications of new physics. One crucial parameter is the top-Higgs Yukawa coupling, which can be best directly probed by the associated production of the Higgs boson with a top quark-antiquark pair ( ). I will present the latest measurement of production with the Higgs boson decaying to a pair, which has the largest branching fraction, obtained using pp collision data at the CERN LHC recorded by the Compact Muon Solenoid (CMS) experiment. I will also talk about my current endeavors and future plans to further study the Higgs boson through the very rare process of its pair production ( ), which provides a direct window into its self-coupling and thus critical to fully understanding the shape of the Higgs field potential. Owing to its extremely small cross-section, measurement of production will be largely improved in the High Luminosity era of the LHC. For this new era, a 6-layer muon detector using Gas Electron Multiplier technology, ME0, will be added as part of the upgrade of the CMS experiment, not only to maintain performance of the muon reconstruction but also to increase acceptance in the far-forward region. I will discuss the design, performance and upcoming construction of the ME0 electronics readout system, along with the development of an online muon track finding algorithm which will play a pivotal role in providing trigger primitives from ME0 to the CMS Level-1 trigger system.

Special date

The talk is in 469 Lauritsen.

Contact theoryinfo@caltech.edu for Zoom information