First observation of the decay D0→K-π+μ+μ-in the ρ0-ω region of the dimuon mass spectrum

LHCb Collaboration

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25 Citations (Scopus)
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Abstract

A study of the decay D0→K-π+μ+μ-is performed using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 2.0 fb-1. Decay candidates with muon pairs that have an invariant mass in the range 675-875 MeV/c2are considered. This region is dominated by the ρ0and ω resonances. The branching fraction in this range is measured to beB(D0→K-π+μ+μ-)=(4.17±0.12(stat)±0.40(syst))×10-6. This is the first observation of the decay D0→K-π+μ+μ-. Its branching fraction is consistent with the value expected in the Standard Model.

Original languageEnglish
Pages (from-to)558-567
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume757
Early online date19 Apr 2016
DOIs
Publication statusPublished - 10 Jun 2016

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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