Contributions of vector-like quarks to radiative B meson decay
Mayumi Aoki, Eri Asakawa, Makiko Nagashima, Noriyuki Oshimo, Akio Sugamoto
Abstract
We study the decay B Xsγin a minimal extension of the standard model with extra up- and down-type quarks whose left- and right-handed components are both SU(2) singlets. Constraints on the extended Cabibbo-Kobayashi-Maskawa matrix are obtained from the experimental results for the branching ratio. Even if the extra quarks are too heavy to be detected in near-future colliders, the branching ratio could have a value which is non-trivially different from the prediction of the standard model.
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