Tauonic B Decays in the Minimal Supersymmetric Standard Model(Particles and Fields)

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概要

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• We study new physics effects on B decay processes including a final τ particle, namely B→D_<τυ> and B→τυ. An important feature of these processes is that a charged Higgs boson can contribute to the decay amplitude at the tree level in models such as Two Higgs Doublet Model and the Minimal Supersymmetric Standard Model (MSSM). We derive a resummed effective Lagrangian for charged-Higgs mediated interactions in the MSSM with the Minimal Flavor Violation. Including supersymmetric (SUSY) loop corrections for down-type-quark and charged-lepton Yukawa couplings, we calculate the branching ratios of the B→D_<τυ> and B→τυ processes. We find that SUSY correction due to gluino-sbottom diagrams can change the Higgs exchange contribution by ±50%, whereas stau-neutralino diagrams can make corrections up to 20%. We also discuss relationship between SUSY corrections in the tauonic decays and flavor changing neutral current processes such as B_s→μ^+μ^- and b→sγ.

• 2005-07-25

著者

• Okada Yasuhiro

  Theory Group High Energy Accelerator Research Organization (kek):department Of Particle And Nuclear

• ITOH Hideo

  Graduate School of Science and Engineering, Ibaraki University

• KOMINE Shinji

  Theory Group, High Energy Accelerator Research Organization (KEK)

• Itoh Hideo

  Graduate School Of Science And Engineering Ibaraki University

• Komine Shinji

  Theory Group High Energy Accelerator Research Organization (kek)

関連論文

• Tauonic B Decays in the Minimal Supersymmetric Standard Model(Particles and Fields)
• Neutrino oscillation SUSY GUT and B decay
• Charged Higgs Mass Bound from the b → sγ Process in the Minimal Supergravity
• Time Reversal Violation in K^+→μ^+νγ Decay and Three Higgs Model
• Tauonic B Decays in the Minimal Supersymmetric Standard Model(Particles and Fields)

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