Measurement of the charge asymmetry in top pair production in CMS

Monday 29 Dec 2025, 14:30 → 16:00 Asia/Seoul

In the Standard Model (SM), the top quark pair production exhibits charge symmetry at the leading order. However, predictions at higher orders introduce an asymmetry due to a preferred direction of top quark momentum originating from the initial quark. Furthermore, various beyond SM models may amplify this asymmetry. Thus, measuring the charge asymmetry in top pair production gives a chance to test SM and new physics models. In this study, I present the measurement of charge asymmetry using the CMS in the LHC.

Measurement of the charge asymmetry in top pair production in CMS

In the Standard Model (SM), the top quark pair production exhibits charge symmetry at the leading order. However, predictions at higher orders introduce an asymmetry due to a preferred direction of top quark momentum originating from the initial quark. Furthermore, various beyond SM models may amplify this asymmetry. Thus, measuring the charge asymmetry in top pair production gives a chance to test SM and new physics models. In this study, I present the measurement of charge asymmetry using the CMS in the LHC.

ChagreAsymmetry_leptop_jets_Yechan.pdf