2024/08/29 by Ajay Kumar Yadav, Yadav, Ajay Kumar, Manas Kumar Mohapatra +3
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2408.16439
openalex publication_date 2024/08/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Discrepancies have been noted between experimental measurements and Standard Model predictions for various observables related to the B→(K, K^*,ϕ) ll processes. Recently, the Belle-II Collaboration observed a 2.8σ deviation from Standard Model predictions in the branching ratio of the B → K νl νl decay mode. In this context, we investigate the exclusive semileptonic Bc→ Ds*μ+ μ- decay mode, mediated by b→ s quark level transition, using Effective Field Theory formalism. We perform a global fit to the new parameters using existing experimental data on b → s μ+ μ-. We then estimate the branching ratio and other observables such as forward-backward asymmetry, lepton polarisation asymmetry, and the lepton non-universality parameter of the Bc→ Ds(*)μ+ μ- process. Although this process has not yet been detected experimentally, we offer predictions and discuss the observables for Bc→ Ds*μ+ μ- in both the Standard Model and potential new physics scenarios.