Studies on Flavor-changing Neutral Currents with Top Quark and Z/Z' boson.

Yuan CHAO^1*, Chun-Ting LIN¹

¹Department of Physics, National Taiwan University, Taipei, Taiwan

* Presenter:Yuan CHAO, email:john@hep1.phys.ntu.edu.tw

The heaviest known elementary particle, the top quark, decays to a bottom quark and a W-boson (t → Wb) with a branching fraction of nearly 100%. The flavor-changing neutral current (FCNC) process on the tZq vertex is highly suppressed by the GIM mechanism. We have been searching for possible FCNC signatures with LHC data using ML algorithms that may caused by new physics. A new direction on Z' search with top FCNC tagged events is also proposed.

Keywords: Large Hadron Collider, Machine Learning, Top Quark, Flavor-changing Neutral Currents