Search for the decays B_(s)⁰→ J/ψγ at LHCb

2026/04/03 by LHCb collaboration, R. Aaij, M. Abdelfatah +1116 · 2 voices
Physics and Astronomy · #hep-ex

paper · pdf

Abstract

A search for the rare decays B_(s)⁰→ J/ψγ is performed with proton-proton collision data collected by the LHCb experiment, corresponding to integrated luminosities of 3~\rmfb^-1 at centre-of-mass energies of 7 and 8 TeV, and 6~\rmfb^-1 at 13 TeV. Assuming no contribution from B⁰→ J/ψγ decay, an upper limit is set on the branching fraction B(B_s⁰→ J/ψγ)<2.9×10^-6 at the 90% confidence level. If instead no contribution from B_s⁰→ J/ψγ decay is assumed, the limit is B(B⁰→ J/ψγ)<2.5×10^-6 at the 90% confidence level. These results supersede the previous LHCb results, with the limit for B_s⁰→ J/ψγ improved by a factor of 2.5.

Citations

• The LHCb Stripping Project: Sustainable Legacy Data Processing for High-Energy Physics
• Performance of the LHCb Outer Tracker
• The LHCb Trigger and its Performance in 2011
• Performance of the LHCb Vertex Locator
• A Brief Introduction to PYTHIA 8.1
• Annihilation Type Radiative Decays of B Meson in Perturbative QCD Approach
• Geant4 developments and applications
• Decay Chain Fitting with a Kalman Filter
• Sensitivity of searches for new signals and its optimization
• Presentation of search results: theCLstechnique
• Evading the CKM Hierarchy: Intrinsic Charm in B Decays
• Review of Particle Physics
• Confidence Level Computation for Combining Searches with Small Statistics
• A desicion-theoretic generalization of on-line learning and an application to boosting

Discussions

• Search for the decays Bₛ⁰→J/ψγ at LHCb - Assuming no contribution from B⁰→J/ψγ decay, an upper limit is set on the branching fraction B(Bₛ⁰→J/ψγ)<2.9× 10⁻⁶. If no contribution from Bₛ⁰→J/ψγ decay is a [bsky, 1 points, 0 comments]
• #LHCbpaper: Search for the decays B⁰_s → J/ψγ at LHCb (arXiv:2604.02933) https://arxiv.org/abs/2604.02933 [bsky, 0 points, 0 comments]