The very rare D*(2007)0 → μ+ μ− decay is searched for by analysing B− → π− μ+ μ− decays. The analysis uses a sample of beauty mesons produced in proton–proton 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 μ+ μ− and π− μ+ μ− 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 → μ+ μ−) < 2.6 × 10^−8 at 90% confidence level. This is the first limit on the branching fraction of D*(2007)0 → μ+ μ− 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.

Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Search for D*(2007)0 → μ+ μ− in B− → π− μ+ μ− Decays. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 83(7), 1-14 [10.1140/epjc/s10052-023-11759-6].

Search for D*(2007)0 → μ+ μ− in B− → π− μ+ μ− Decays

Carbone, A.;Ferrari, F.;Galli, D.;Manuzzi, D.;Patrignani, C.;Spedicato, E.;Villa, A.;Zucchelli, S.;
2023

Abstract

The very rare D*(2007)0 → μ+ μ− decay is searched for by analysing B− → π− μ+ μ− decays. The analysis uses a sample of beauty mesons produced in proton–proton 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 μ+ μ− and π− μ+ μ− 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 → μ+ μ−) < 2.6 × 10^−8 at 90% confidence level. This is the first limit on the branching fraction of D*(2007)0 → μ+ μ− 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.
2023
Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Search for D*(2007)0 → μ+ μ− in B− → π− μ+ μ− Decays. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 83(7), 1-14 [10.1140/epjc/s10052-023-11759-6].
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/952386
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