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- Title
Λ<sub>b</sub>→Λℓ<sup>+</sup>ℓ<sup>-</sup> decay in universal extra dimensions.
- Authors
Aliev, T. M.; Savcı, M.
- Abstract
We study the exclusive Λb→Λℓ+ℓ- 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- (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+ℓ- 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.
- Subjects
LEPTONS (Nuclear physics) -- Polarization; COMPACTIFICATION (Mathematics); BRANCHING ratios; FERMIONS; HAMILTONIAN systems; KALUZA-Klein theories; LORENTZ transformations
- Publication
European Physical Journal C -- Particles & Fields, 2007, Vol 50, Issue 1, p91
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-006-0203-5