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.
AU  - Zhuo, J.
PY  - 2023
DA  - 2023//
TI  - Search for D*(2007)0 → μ+ μ- in B- → π- μ+ μ- decays
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 666 - 14pp
VL  - 83
IS  - 7
PB  - Springer
AB  - The very rare D*(2007)(0) -> mu(+) mu(-) decay is searched for by analysing B- -> pi (-) mu(+) mu(-) decays. The analysis uses a sample of beautymesons produced in protonproton collisions collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb(-1). The signal signature corresponds to simultaneous peaks in the mu(+) mu(-) and pi(-) mu(+) mu(-) invariant masses. No evidence for an excess of events over background is observed and an upper limit is set on the branching fraction of the decay at B(D-*(2007)(0) -> mu(+) mu(-)) < 2.6 x 10(-8) at 90% confidence level. This is the first limit on the branching fraction of D*(2007)(0) -> mu(+) mu(-) decays and the most stringent limit on D* (2007)(0) decays to leptonic final states. The analysis is the first search for a rare charm-meson decay exploiting production via beauty decays.
SN  - 1434-6044
UR  - https://arxiv.org/abs/2304.01981
UR  - https://doi.org/10.1140/epjc/s10052-023-11759-6
DO  - 10.1140/epjc/s10052-023-11759-6
LA  - English
N1  - WOS:001062453500001
ID  - LHCbCollaborationAaij_etal2023
ER  -