Measurement of the ${\Lambda }_b^0\to \Lambda (1520){\mu }^{+}{\mu }^{-}$ differential branching fraction

Abstract

The branching fraction of the rare decay ${\Lambda }_b^0\to \Lambda (1520){\mu }^{+}{\mu }^{-}$ is measured for the first time, in the squared dimuon mass intervals, $q^2$, excluding the $J/\psi$ and $\psi (2S)$ regions. The data sample analyzed was collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of $9{\mathrm{fb}}^{-1}$. The result in the highest $q^2$ interval, $q^2>15.0{\mathrm{GeV}}^2/c^4$, where theoretical predictions have the smallest model dependence, agrees with the predictions.

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-050.html (LHCb public pages)

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Cited by in corpus (3)

• Amplitude analysis of the $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decay
• Determination of short- and long-distance contributions in $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decays
• First measurement of time-dependent $CP$ violation in the flavor-changing neutral-current decay $B^0\to K_S^0{\mu }^{+}{\mu }^{-}$