| Popis: |
We introduce an anomalous top quark coupling (right-handed current) into the standard model Lagrangian. Based on this, a more complete calculation of {ital b}{r_arrow}{ital s}{gamma} decay including leading log QCD corrections from {ital m}{sub {ital t}} to {ital M}{sub {ital W}} in addition to corrections from {ital M}{sub {ital W}} to {ital m}{sub {ital b}} is given. The inclusive decay rate is found to be suppressed compared with the case without QCD running from {ital m}{sub {ital t}} to {ital M}{sub {ital W}} except at the time of small values of {vert_bar}{ital f}{sub {ital R}}{sup {ital t}{ital b}}{vert_bar}. For example, when {ital f}{sub {ital R}}{sup {ital t}{ital b}}={minus}0.08, it is only 1/10 of the value given before. As {vert_bar}{ital f}{sub {ital R}}{sup {ital t}{ital b}}{vert_bar} gets smaller, this contribution is an enhancement as in the standard model case. From the new experiment of the CLEO Collaboration, strict restrictions to parameters of this top-bottom quark coupling are found. |
