Exploring the lepton flavor violating decay modes b → sμ±τ∓ in SMEFT approach
Year: 2024
Type: article
Abstract: We perform an analysis of the consequences of various new physics operators on the lepton flavor violating (LFV) decay modes mediated through b → s ℓ 1 ℓ 2 transitions. We scrutinize the imprints of the (pseudo)scalar and axial (vector) operators on the exclusive LFV decay channels B ( s ) → ( ϕ , K ⁎ , K 2 ⁎ ) ℓ 1 ℓ 2 and Λ b → Λ ℓ 1 ℓ 2 , where ℓ 1 , ℓ 2 represent μ or τ . The new physics parameters are constrained by using the upper limits of the branching fractions of the B s → τ μ and B → K τ μ processes, assuming the new physics couplings to be real. We then explore the key observables such as the branching fractions, the forward-backward asymmetries, and the longitudinal polarization fractions of the B → ( K ⁎ , ϕ , K 2 ⁎ ) τ ± μ ∓ decays. In addition, we also investigate the impact of the new physics couplings on the baryonic Λ b → Λ τ ± μ ∓ decay channels mediated by the b → s quark level transition. With the experimental prospects at LHCb upgrade and Belle II, we also predict the upper limits of the above-discussed observables, which could intrigue the new physics search in these channels.
Source: Nuclear Physics B
Institution: University of Hyderabad
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Funder: University of Hyderabad
OpenAlex ID: W4403479604