Vectorlike quark model and decays B→Xsl〔+〕l〔-〕,B→Kπ (〔素粒子論グループ〕SUMMER INSTITUTE 2004)

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概要

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• In the framework of SU(2) singlet down type vectorlike quark model, we present a comprehensive analysis for decays B→X_γ, B→X_sl^+l^- and B→Kπ. Usingthe recent measurements of B→X_sl^+l^-, we extract rather stringent constraints on the size and CP violating phase of z_<sb>, i.e., the tree level FCNC coupling for b→sZ. Within the bounds, we investigate various observables. We find that (1) The forward-backward asymmetry may have large derivation from that of the SM and is very sensitive to z_<sb>, and thus can be useful in probing the new physics. (2) By taking experimental errors at 2σ level, both experimental measurements for B→X_sl^+l^- and B→Kπ decays can be explained in this model.

• 素粒子論グループ 素粒子研究編集部の論文
• 2005-03-20

著者

• Xiong Z.h.

  Graduate Scool Of Science Hiroshima University

関連論文

• Vectorlike quark model and decays B→Xsl〔+〕l〔-〕,B→Kπ (〔素粒子論グループ〕SUMMER INSTITUTE 2004)

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