(Lambda_b -> Lambda l^+ l^-) decay in universal extra dimensions

Details (Lambda_b -> Lambda l^+ l^-) decay in universal extra dimensions (Lambda_b -> Lambda l^+ l^-) decay in universal extra dimensions

2006-06-21

arxiv.org/abs/hep-ph/0606225v1

Eur.Phys.J.C50:91-99,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 3 figures, LaTeX formatted

Scientific paper

10.1140/epjc/s10052-006-0203-5

We study the exclusive (Lambda_b -> \Lambda l^+ l^-) decay in the Appelquist, Chang, Dobrescu model within one 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 that the branching ratio changed about 50% compared to the SM value, when (1/R=200 GeV) and 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^-) decay and determination of zero position of A_{FB} are very useful in looking for new physics in the framework of the UED models.

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