Longitudinal polarization asymmetry of leptons in pure leptonicBdecays

Abstract

Longitudinal polarization asymmetry of leptons in B q → ℓ + ℓ − (q = d, s and ℓ = e, µ, τ ) decays is investigated. The analysis is done in a general manner by using the effective operators approach. It is shown that the longitudinal polarization asymmetry would provide a direct search for the scalar and pseudoscalar type interactions, which are induced in all variants of Higgs-doublet models. *

Rare decaysBs→l+l−andB→Kl+l−<

“…So these rare decays are rather sensitive to the contributions from the NP models beyond the SM. Studying of the observables of the asymmetries, such as the CP asymmetry [2], longitudinal polarization (LP) asymmetry A LP [3], and forwardbackward (FB) asymmetry A FB [4] etc, interests experiments in testing NP. Certainly, their detection requires excellent triggering and identification of leptons with low misidentification rates for hadrons.…”

“…The observable A LP was introduced in Ref. [3], though the corresponding analysis in the context of K ! þ À had been carried out earlier [9].…”

Exclusive semileptonic rare decays $B \to K^{(*)} l^ + l^-$ in a SUSY SO(10) GUT

“…There are a great deal of studies for processes B → K ( * ) l + l − in theory. A model independent analysis has been carried out in [7,8] and a lot of papers perform the investigation in many new physics scenarios [9,10,11,12,13,14,15,16,17,18] and some works [19,20,21] are dedicated to the double lepton polarization. It has been pointed out [12,13,16] that in the some types of two-Higgs-double model and SUSY models the neutral Higgs bosons have sizable contributions to these decays (for l = µ, τ ) at large tan β.…”

The Higgs Penguin and Its Applications: An Overview

“…This category includes the master application have been studied in [58], [59] and [60], respectively, and the lepton polarization asymmetry in B → ll or K → ll decays has been studied in [61] and [62], respectively.…”