Observation of <i>D</i><SUP>0</SUP> meson decays to π<SUP>+</SUP> π<SUP>-</SUP> μ<SUP>+</SUP> μ<SUP>-</SUP> and <i>K</i><SUP>+</SUP> <i>K</i><SUP>-</SUP> μ<SUP>+</SUP> μ<SUP>-</SUP> final states



Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Albero, A Alfonso, Ali, S
et al (show 794 more authors) (2017) Observation of <i>D</i><SUP>0</SUP> meson decays to π<SUP>+</SUP> π<SUP>-</SUP> μ<SUP>+</SUP> μ<SUP>-</SUP> and <i>K</i><SUP>+</SUP> <i>K</i><SUP>-</SUP> μ<SUP>+</SUP> μ<SUP>-</SUP> final states. PHYSICAL REVIEW LETTERS, 119 (18). 181805-.

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Abstract

The first observation of the D^{0}→π^{+}π^{-}μ^{+}μ^{-} and D^{0}→K^{+}K^{-}μ^{+}μ^{-} decays is reported using a sample of proton-proton collisions collected by LHCb at a center-of-mass energy of 8 TeV, and corresponding to 2  fb^{-1} of integrated luminosity. The corresponding branching fractions are measured using as normalization the decay D^{0}→K^{-}π^{+}[μ^{+}μ^{-}]_{ρ^{0}/ω}, where the two muons are consistent with coming from the decay of a ρ^{0} or ω meson. The results are B(D^{0}→π^{+}π^{-}μ^{+}μ^{-})=(9.64±0.48±0.51±0.97)×10^{-7} and B(D^{0}→K^{+}K^{-}μ^{+}μ^{-})=(1.54±0.27±0.09±0.16)×10^{-7}, where the uncertainties are statistical, systematic, and due to the limited knowledge of the normalization branching fraction. The dependence of the branching fraction on the dimuon mass is also investigated.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-019.html
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 12 Jan 2018 11:38
Last Modified: 07 Oct 2023 12:23
DOI: 10.1103/PhysRevLett.119.181805
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3015933