文献类型：期刊文献

英文题名：Distinguishing the right-handed up/charm quarks from the top quark via discrete symmetries in standard model extensions

作者：Huang, Chao-Shang[1];Li, Tianjun[1,2];Wang, Xiao-Chuan[1];Wu, Xiao-Hong[1,3]

机构：[1]Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China;[2]Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Peoples R China;[3]E China Univ Sci & Technol, Inst Modern Phys, Shanghai 200237, Peoples R China

年份：2014

卷号：90

期号：5

外文期刊名：PHYSICAL REVIEW D

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000341264900007)】；

基金：This research was supported in part by the Natural Science Foundation of China under Grants No. 10075069, No. 11375248, No. 10821504, No. 11075194, No. 11135003, No. 11135009, and No. 11275246.

语种：英文

摘要：We propose a class of the two Higgs doublet standard models (SMs) with a SM singlet and a class of supersymmetric SMs with two pairs of Higgs doublets, where the right-handed up/charm quarks and the right-handed top quark have different quantum numbers under extra discrete symmetries. Thus, the right-handed up and charm quarks couple to one Higgs doublet field, while the right-handed top quark couples to another Higgs doublet. The quark Cabibbo-Kobayashi-Maskawa mixings can be generated from the down-type quark sector. As one of the phenomenological consequences of our models, we explore whether one can accommodate the observed direct CP asymmetry difference in singly Cabibbo-suppressed D decays. We how that it is possible to explain the measured values of CP violation under relevant experimental constraints.