Past Events

Abstract

Particle physics is the study of elementary particles in nature and their interactions. The Standard Model (SM) of particle physics, though successfully explaining and predicting a variety of experimental results, is believed not to be the ultimate theory for both theoretical and experimental reasons. Searching for physics beyond the SM (BSM), therefore, is one of the top priorities for experimental particle physicists. One of the main approaches is measuring the properties of the top quark. The top quark is distinguished among the elementary particles discovered so far by its large mass (~170 times proton mass). Theoretical studies suggest that the BSM physics may first manifest itself in their interactions with the top quark. The Large Hadron Collider (LHC), the world's largest and highest-energy particle accelerator, provides a great opportunity to explore this direction. At the LHC, the top quark properties are expected to be examined with significant precision.

In addition, the BSM physics typically predicts the existence of either "partner" particle for the top quark, or top-like heavy quark. The production cross sections of these new particles are expected to be several orders of magnitude larger than those at the Tevatron, the previous largest hadron collider in the world. This fact further enhances the significance of the LHC in exploring the BSM physics.

In this talk, I will present my work on the measurements of the top-quark properties and the search for the top-like particle in the CMS experiment. I will also introduce my research plans for the future.

Coffee and tea will be served 20 minutes prior to the seminar.