The branching fraction and effective lifetime of B_(s)⁰ → μ⁺ μ^- at LHCb with Run 1 and Run 2 data

2017/05/09 by M. Mulder, Mulder, Mick
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1705.03274

openalex publication_date 2017/05/09 · openalex created_date 2022/10/01 · openalex updated_date 2026/07/28

Abstract

After Run 1 of the LHC, global fits to b → s ℓ ℓ observables show a deviation from the Standard Model (SM) with a significance of ∼ 4 standard devations. An example of a b → s ℓ ℓ process is the decay of a B_s⁰ meson into two muons (B_s⁰ → μ⁺ μ^-). The latest analysis of B_(s)⁰ → μ⁺ μ^- decays by LHCb with Run 1 and Run 2 data is presented. The B_s⁰ → μ⁺ μ^- decay is observed for the first time by a single experiment. In addition, the first measurement of the B_s⁰ → μ⁺ μ^- effective lifetime is performed. No significant excess of B⁰ → μ⁺ μ^- decays is observed. All results are consistent with the SM and constrain New Physics in b → s ℓ ℓ processes.

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