%0 Journal Article
%T A search for rare B → D μ+ μ- decays
%A LHCb Collaboration (Aaij, R. et al
%A Jaimes Elles, S. J.
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Rebollo De Miguel, M.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%A Sanderswood, I.
%J Journal of High Energy Physics
%D 2024
%V 02
%N 2
%I Springer
%@ 1029-8479
%G English
%F LHCbCollaborationAaij_etal2024
%O WOS:001162252300001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5980), last updated on Wed, 10 Apr 2024 12:38:33 +0000
%X A search for rare B. D mu+ mu- decays is performed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1. No significant signals are observed in the non-resonant mu+ mu- modes, and upper limits of B -> B0. D0 mu+ mu- < 5.1 x 10-8, B B+. D+ s mu+ mu- -> < 3.2 x 10-8, B -> B0 s. D0 mu+ mu--> < 1.6 x 10-7 and fc/fu center dot B B+ c. D+ s mu+ mu--> < 9.6 x 10-8 are set at the 95% confidence level, where fc and fu are the fragmentation fractions of a B meson with a c and u quark respectively in proton-proton collisions. Each result is either the first such measurement or an improvement by three orders of magnitude on an existing limit. Separate upper limits are calculated when the muon pair originates from a J/.. mu+ mu- decay. The branching fraction of B+ c. D+ s J/. multiplied by the fragmentation-fraction ratio is measured to be fc fu center dot B -> B+ c. D+ s J/.-> = (1.63 +/- 0.15 +/- 0.13) x 10-5, where the first uncertainty is statistical and the second systematic.
%K B Physics
%K Flavour Physics
%K Hadron-Hadron Scattering
%K Rare Decay
%R 10.1007/JHEP02(2024)032
%U https://arxiv.org/abs/2308.06162
%U https://doi.org/10.1007/JHEP02(2024)032
%P 032-23pp