Regular Article - Theoretical Physics
Study of Λ b →Λρ 0, pK ∗− and pρ − decays in the non-universal Z′ model
Department of Physics, Nanyang Normal University, Nanyang, 473061, China
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Revised: 9 December 2011
Published online: 3 January 2012
We have investigated the effects of the family of a non-universal Z′ model on the Λ b →Λρ 0, pK ∗− and pρ − decays. This model includes the interactions between fermions and the Z′ boson, with the contributions of flavor-changing neutral currents (FCNCs) mediated by the Z′ boson, and we find that the branching ratio for Λ b →Λρ 0 decay is significantly enhanced from its corresponding standard model (SM) value. It reaches up to the level; the currently running experiments could make observations of this decay process. For the Λ b →pK ∗− and Λ b →pρ − decays, their branching ratios are also sensitive to the new physics (NP) weak phases.
© Springer-Verlag / Società Italiana di Fisica, 2012