摘要
The deviation of the measurement of RD （RD＊） from the Standard Model （SM） expectation is 2.3σ （3.1σ）. RD （RD＊） is the ratio of the branching fraction of ^-B→Dτ^-υτ （^-B→D^＊τ^-υτ ） to that of ^-B→Dl^-υι （^-B→Dl^-υι）, where l=e or μ. This anomaly may imply the existence of new physics （NP）. In this paper, we restudy this problem in the supersymmetric extension of the Standard Model with local gauged baryon and lepton numbers （BLMSSM）, and give one-loop corrections to RD （RD^＊）.
The deviation of the measurement of RD （RD＊） from the Standard Model （SM） expectation is 2.3σ （3.1σ）. RD （RD＊） is the ratio of the branching fraction of ^-B→Dτ^-υτ （^-B→D^＊τ^-υτ ） to that of ^-B→Dl^-υι （^-B→Dl^-υι）, where l=e or μ. This anomaly may imply the existence of new physics （NP）. In this paper, we restudy this problem in the supersymmetric extension of the Standard Model with local gauged baryon and lepton numbers （BLMSSM）, and give one-loop corrections to RD （RD^＊）.
作者
杨忠军
赵树民
董幸幸
展希杰
张海斌
冯太傅
Zhong-Jun Yang;Shu-Min Zhao;Xing-Xing Dong;Xi-Jie Zhan;Hai-Bin Zhang;Tai-Fu Feng(National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices,Department of Physics,Hebei University,Baoding 071002,China)
基金
Supported by the NNSFC(11535002,11605037,11705045)
the Natural Science Foundation of Hebei Province(A2016201010,A2016201069)
the Natural Science Fund of Hebei University(2011JQ05,2012-242)
and Hebei Key Lab of Opto-Electronic Information and Materials,the Midwest Universities Comprehensive Strength Promotion Project
