Search for B_(s)^*0→μ⁺μ^- in B_c⁺→π⁺μ⁺μ^- decays

2024/09/25 by LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1116 · 1 voice
Physics and Astronomy · #hep-ex

paper · pdf · doi:10.1140/epjc/s10052-024-13573-0

arxiv published 2024/09/25 · arxiv updated 2025/01/14

Abstract

A search for the very rare B^*0→μ⁺μ^- and B_s^*0→μ⁺μ^- decays is conducted by analysing the B_c⁺→ π⁺μ⁺μ^- process. The analysis uses proton-proton collision data collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb^-1. The signal signatures correspond to simultaneous peaks in the μ⁺μ^- and π⁺μ⁺μ^- invariant masses. No evidence for an excess of events over background is observed for either signal decay mode. Upper limits at the 90% confidence level are set on the branching fractions relative to that for B_c⁺→ J\mskip -3mu/\mskip -2muψπ⁺ decays, \cal R_{B^*0(μ⁺μ^-)π⁺/J\mskip -3mu/\mskip -2muψπ⁺} < 3.8× 10^-5 and \cal R_B_s^*0(μ⁺μ^-)π⁺/J\mskip -3mu/\mskip -2muψπ⁺ < 5.0× 10^-5 .

Discussions

• Search for B*⁰₍ₛ₎→μ⁺μ⁻ in B⁺c→π⁺μ⁺μ⁻ decays arxiv.org/abs/2409.17209 - Upper limits at the 90% confidence level are set on the branching fractions of B*⁰→μ⁺μ⁻ and B*⁰ₛ→μ⁺μ⁻ relative to that for B⁺c→J [bsky, 4 points, 0 comments]

Related

• B⁰_(s) → μ⁺μ^- at CMS
• Evidence for the Rare Decay B + → Λ ¯ p μ + μ −
• B⁰_s → μ⁺μ^- at LHC
• Search for K_S(L)⁰ → π⁺π^-μ⁺μ^- decays at LHCb
• Search for the decays B⁺_(c) → μ⁺ ν_μγ