First observation of the decay D0→K−π+μ+μ− in the ρ0–ω region of the dimuon mass spectrum
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1-s2.0-S0370269316301022-main.pdf
Description
Published version
Size
698.85 KB
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Unknown
Checksum (MD5)
7cb633386bd896a7b9ee0e25cac6a9e9
Author(s)
The LHCb Collaboration
Ilten, Philip J
Williams, Michael
Date Issued
2016
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publisher
Elsevier BV
Citation
Aaij, R., et al. "First Observation of the Decay D0?K-?+?+?- in the ?0-O Region of the Dimuon Mass Spectrum." Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 757 (2016): 558-67.
Version
Final published version
Abstract
© 2016 CERN for the benefit of the LHCb Collaboration. 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/J.PHYSLETB.2016.04.029
