Testing new physics models by top charge asymmetry and polarization at the LHC

Junjie Cao, Kenichi Hikasa, Lin Wang, Lei Wu, Jin Min Yang

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


As a top quark factory, the LHC can test new physics models used to explain the top quark forward-backward asymmetry AFBt measured at the Tevatron. In this work we perform a comparative study for two such models: the W model and the color triplet diquark model. Requiring these models to explain AFBt and also satisfy the top pair production rate measured at the Tevatron, we examine their contributions to the LHC observables such as the polarizations and charge asymmetries in top quark productions and the charge asymmetry in W (or) pair production. We find that these observables can be enhanced to their observable levels and current LHC measurement on the top charge asymmetry has already tightly constrained the W model. We also find that each observable shows different characteristics in different models, which can be utilized to discriminate the models.

Original languageEnglish
Article number014025
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number1
Publication statusPublished - 2012 Jan 25


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