b→sγ decay and right-handed top-bottom charged current

Cai-Dian Lü, Jing-Liang Hu, Chongshou Gao
1995 Physical Review D, Particles and fields  
We introduce an anomalous top quark coupling (right-handed current) into Standard Model Lagrangian. Based on this, a more complete calculation of b → sγ decay including leading log QCD corrections from m_top to M_W in addition to corrections from M_W to m_b is given. The inclusive decay rate is found to be suppressed comparing with the case without QCD running from m_t to M_W except at the time of small values of |f_R^tb|. e.g. when f_R^tb=-0.08, it is only 1/10 of the value given before. As
more » ... given before. As |f_R^tb| goes smaller, this contribution is an enhancement like standard model case. From the newly experiment of CLEO Collaboration, strict restrictions to parameters of this top-bottom quark coupling are found.
doi:10.1103/physrevd.52.4019 pmid:10019628 fatcat:zdorrcqspbadxpapwo75mt6tca