Search for the $ {B}_s^0 $→ μ$^{+}$μ$^{−}$γ decay - INSPIRE

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Search for the ${B}_s^0$ → μ $^{+}$ μ $^{−}$ γ decay

LHCb

Collaboration

Apr 4, 2024

28 pages

Published in:

JHEP 07 (2024) 101

Published: Jul 11, 2024

e-Print:

2404.03375 [hep-ex]

DOI:

10.1007/JHEP07(2024)101

Report number:

LHCb-PAPER-2023-045,
CERN-EP-2024-065

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (Springer)

A search for the fully reconstructed

{B}_s^0

→ μ

^{+}

μ

^{−}

γ decay is performed at the LHCb experiment using proton-proton collisions at

\sqrt{s}

= 13 TeV corresponding to an integrated luminosity of 5.4 fb

^{−1}

. No significant signal is found and upper limits on the branching fraction in intervals of the dimuon mass are set

\begin{array}{cc}\mathcal{B}\left({B}_s^0\to {\mu}^{+}{\mu}^{-}\gamma \right)<4.2\times {10}^{-8},& m\left({\mu}^{+}{\mu}^{-}\right)\in \left[2{m}_{\mu },1.70\right]\textrm{GeV}/{c}^2,\\ {}\mathcal{B}\left({B}_s^0\to {\mu}^{+}{\mu}^{-}\gamma \right)<7.7\times {10}^{-8},&\ m\left({\mu}^{+}{\mu}^{-}\right)\in \left[\textrm{1.70,2.88}\right]\textrm{GeV}/{c}^2,\\ {}\mathcal{B}\left({B}_s^0\to {\mu}^{+}{\mu}^{-}\gamma \right)<4.2\times {10}^{-8},& m\left({\mu}^{+}{\mu}^{-}\right)\in \left[3.92,{m}_{B_s^0}\right]\textrm{GeV}/{c}^2,\end{array}

at 95% confidence level. Additionally, upper limits are set on the branching fraction in the [2m

_{μ}

, 1.70] GeV/c

^{2}

dimuon mass region excluding the contribution from the intermediate ϕ(1020) meson, and in the region combining all dimuon-mass intervals.[graphic not available: see fulltext]

Note:

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2023-045.html

B Physics
Flavour Physics
Hadron-Hadron Scattering
Rare Decay
dimuon: mass
p p: scattering
GeV
branching ratio
meson
TeV

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