Λb → Λl+l- decay in universal extra dimensions

被引：32

作者：

Aliev, T. M. ^{[1
]}

Savci, M. ^{[1
]}

机构：

[1] Middle E Tech Univ, Dept Phys, TR-06531 Ankara, Turkey

来源：

EUROPEAN PHYSICAL JOURNAL C | 2007年 / 50卷 / 01期

关键词：

D O I：

10.1140/epjc/s10052-006-0203-5

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We study the exclusive Lambda(b) ->Lambda l(+)l(-)(l = mu,Gamma) decay in the Appelquist, Chang, Dobrescu model with a single universal extra dimension. We investigate the sensitivity of the branching ratio, lepton polarization and forward-backward asymmetry A(FB) to the compactification parameter 1/R. We obtain the result that the branching ratio for the Lambda(b) -> Lambda l(+)l(-) (l = mu, T) decay changes about 25% compared to the SM value when 1/R = 250 GeV, and the zero position of the forward-backward asymmetry is shifted to the left compared to the SM result. Therefore, measurement of the branching ratio of Lambda(b) -> Lambda l(+)l(-) (l = mu,T) decay and determination of the zero position of AFB are very useful in looking for new physics in the framework of the UED models.

引用

页码：91 / 99

页数：9

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