T violation in ${\Lambda }_b\to \Lambda {\ell }^{+}{\ell }^{-}$ decays

Abstract

We examine the T-odd transverse lepton and $\Lambda$ polarizations in the baryonic decays of ${\Lambda }_b\to \Lambda l^{+}{l}^{-}(l=e,\mu )$ to study the T violating effects. We show that the lepton polarizations are suppressed but the $\Lambda$ ones can be as large as 50% in CP violating theories beyond the standard model such as the SUSY models, which can be tested in various future hadron colliders.

arXiv comment4 pages, 3 figures, Talk presented by C.Q. Geng at the 5th International Conference on Hyperons, Charm and Beauty Hadrons

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• T-violating triple product asymmetries in Lambda_b --> Lambda pi pi decay
• Analysis of ${\Lambda }_b\to \Lambda l^{+}{l}^{-}$ rare decays in a non-universal $Z^{\prime }$ model
• Model Independent Tests for Time Reversal and CP Violations and for CPT Theorem in Λ_b and \barΛ_b Two Body Decays
• Study of $B_s^0\to l^{+}{l}^{-}\gamma$ decays in the nonuniversal Z' model