New physics effects in semileptonic B_s → K^*+(→ Kπ) ℓ^- ν_ℓ decay

2024/11/05 by Shabana Khan, Dinesh Kumar, Khan, Shabana +1
Physics and Astronomy · Engineering · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Particle Accelerators and Free-Electron Lasers

paper · pdf · doi:10.48550/arxiv.2411.03238

Abstract

We analyze the new physics effects in semileptonic B_s → K^*+(→ Kπ) ℓ^- ν_ℓ decay induced by the b → u ℓ ν_ℓ quark level transition. We consider the vector, scalar and tensor new physics Lorentz structures in addition to the SM in effective field theory approach. Constraints on new physics parameters are obtained from experimental observations of both semileptonic and leptonic decays of B mesons, which are governed by the underlyng b → u ℓ ν_ℓ transition. We explore the new physics effects in differential branching fraction, lepton forward-backward asymmetry, fraction of longitudinal polarization of K^* meson and normalized angular observables in B_s → K^*+(→ Kπ) ℓ^- ν_ℓ decay.

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