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The European Physical Journal C

, Volume 50, Issue 1, pp 91–99 | Cite as

Λb→Λℓ+- decay in universal extra dimensions

  • T.M. Aliev
  • M. SavcıEmail author
Regular Article - Theoretical Physics

Abstract

We study the exclusive Λb→Λℓ+- 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 \(\mathcal{A}_{\text{FB}}\) to the compactification parameter 1/R. We obtain the result that the branching ratio for the Λb→Λℓ+- (ℓ=μ,τ) 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 Λb→Λℓ+- decay and determination of the zero position of \(\mathcal{A}_{\text{FB}}\) are very useful in looking for new physics in the framework of the UED models.

Keywords

Form Factor Semileptonic Decay Universal Extra Dimension Lepton Polarization Standard Model Result 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  1. 1.Physics DepartmentMiddle East Technical UniversityAnkaraTurkey

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