TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Jaimes Elles, S. J.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Rebollo De Miguel, M.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
AU  - Sanderswood, I.
PY  - 2024
DA  - 2024//
TI  - A search for rare B → D μ+ μ- decays
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 032
EP  - 23pp
VL  - 02
IS  - 2
PB  - Springer
KW  - B Physics
KW  - Flavour Physics
KW  - Hadron-Hadron Scattering
KW  - Rare Decay
AB  - 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.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2308.06162
UR  - https://doi.org/10.1007/JHEP02(2024)032
DO  - 10.1007/JHEP02(2024)032
LA  - English
N1  - WOS:001162252300001
ID  - LHCbCollaborationAaij_etal2024
ER  -