## 抄録

The b→sl^{+}l^{-} process is studied in the minimal supergravity model in detail. Taking into account the long-distance contributions from the cc̄ resonances, we calculate the branching ratio and the lepton forward-backward asymmetry in this model. We find that there is a strong correlation between the branching ratios of b-→sγ and b→sl^{+}/^{-} processes and that the interference effect can change the b→sl^{+}l^{-} branching ratio in the off-resonance regions by up to ±15% depending on the relative phase between the long- and short-distance contributions. Using various phenomenological constraints including the branching ratio of b→s γ, we show that there are regions in the parameter space where the branching ratio of b→sl^{+}l^{-} is enhanced by about 50% compared to the standard model (SM). We also show that the branching ratio of b→s ν ν + ̄ is reduced at most by 10% from the SM prediction.

本文言語 | English |
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ページ（範囲） | 4273-4289 |

ページ数 | 17 |

ジャーナル | Physical Review D - Particles, Fields, Gravitation and Cosmology |

巻 | 55 |

号 | 7 |

出版ステータス | Published - 1997 4月 1 |

## ASJC Scopus subject areas

- 数理物理学
- 物理学および天文学（全般）
- 核物理学および高エネルギー物理学
- 物理学および天文学（その他）