Search for D∗(2007)0→μ+μ− in B−→π−μ+μ− decays

Abstract

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 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 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(-)) < 2.6x10(-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

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    Last time updated on 10/09/2023