First observation of the decay D0 → K–π+μ+μ– in the ρ0 – ω region of the dimuon mass spectrum
Journal Article
·
· Physics Letters. B
A study of the decayD0 → 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/c2 are considered. This region is dominated by the ρ0 and ω resonances. The branching fraction in this range is measured to be $$\mathscr{B}$$(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.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Contributing Organization:
- LHCb Collaboration
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1525152
- Journal Information:
- Physics Letters. B, Vol. 757, Issue C; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 12 works
Citation information provided by
Web of Science
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