Search for the lepton-flavour violating decay D0→e±μ

LHCb Collaboration

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Abstract

A search for the lepton-flavour violating decay D0→e±μis made with a dataset corresponding to an integrated luminosity of 3.0 fb-1of proton-proton collisions at centre-of-mass energies of 7TeV and 8TeV, collected by the LHCb experiment. Candidate D0mesons are selected using the decay D*+→D0π+and the D0→e±μbranching fraction is measured using the decay mode D0→K-π+as a normalization channel. No significant excess of D0→e±μcandidates over the expected background is seen, and a limit is set on the branching fraction, B(D0→e±μ∓)<1.3×10-8, at 90% confidence level. This is an order of magnitude lower than the previous limit and it further constrains the parameter space in some leptoquark models and in supersymmetric models with R-parity violation.

Original languageEnglish (US)
Pages (from-to)167-175
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume754
DOIs
StatePublished - Mar 10 2016

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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