Status of Searching for Top Quark FCNC Mediated with Higgs Boson Decaying to Two Photons at CMS Experiment

Kirill Skovpen¹, Ludivine Ceard², Kai-Feng Chen², Meng-Cheng Chen², Yu-Wei Kao^2*, Claudio Campagnari³, Hualin Mei³, Samuel May⁴, Frank Wuerthwein⁴, Avi Yagil⁴, Frank Golf⁵

¹Physics, Ghent University, Ghent, Belgium
²Physics, National Taiwan University, Taiwan, Taiwan
³Physics, University of California Santa Barbara, California, USA
⁴Physics, University of California San Diego, California, USA
⁵Physics, University of Nebraska–Lincoln, Nebraska, USA

* Presenter:Yu-Wei Kao, email:d07222014@ntu.edu.tw

The status of the search for flavor changing neutral current (FCNC) involving a top quark and a Higgs boson decaying to two photons is presented. The study is based on proton-proton collision data collected with the Compact Muon Solenoid (CMS) detector during the period from 2016 to 2018 at the Large Hadron Collider (LHC). The analysis strategy is well developed including the description of the various machine learning techniques, such as neural networks (NNs) and the boosted decision trees (BDTs). The steps toward upper limit extraction will also be covered. Since most CMS published papers on related topics are still from 8 TeV or with 2016 data at 13 TeV only, the sensitivity on the new upper limits is expected to be exciting.

Keywords: Top quark, Higgs boson, Flavour changing neutral current, CMS, LHC