Rare decays Λb → Λl+l− in the 331 models
Department of Physics, Liaoning Normal University - Dalian 116029, China
Received: 9 April 2014
Accepted: 26 May 2014
Taking into account the constraints on the 331 models, we consider the rare decays using the form factors calculated in full QCD. We find that the contributions of the 331 models to some observables, such as the branching ratios, forward-backward asymmetry and polarizations, mainly come from the new neutral gauge boson . In a wide range of parameter space, they can produce significant correction effects on some of these observables.
PACS: 13.30.Ce – Leptonic, semileptonic, and radiative decays / 12.60.Cn – Extensions of electroweak gauge sector / 14.70.Pw – Other gauge bosons
© EPLA, 2014