Search for the decay D[superscript 0] → π[superscript +]π[superscript -]μ[superscript +]μ[superscript -]
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Aaij-2014-Search for the decay.pdf
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636.13 KB
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31a36da095aad99ddbedd0e9d0a5a430
Author(s)
Williams, Michael
Date Issued
November 2013
Journal
Physics Letters B
Publisher
Elsevier
Citation
Aaij, R. et al. “Search for the Decay D[superscript 0] → π[superscript +]π[superscript -]μ[superscript +]μ[superscript -].” Physics Letters B 728 (January 2014): 234–243.
Version
Final published version
Abstract
A search for the D[superscript 0]→π[superscript +]π[superscript −]μ[superscript +]μ[superscript −] decay, where the muon pair does not originate from a resonance, is performed using proton–proton collision data corresponding to an integrated luminosity of 1.0 fb[superscript −1] recorded by the LHCb experiment at a centre-of-mass energy of 7 TeV. No signal is observed and an upper limit on the relative branching fraction with respect to the resonant decay mode D[superscript 0]→π[superscript +]π[superscript −]ϕ(→μ[superscript +]μ[superscript −]), under the assumption of a phase-space model, is found to be B(D[superscript 0]→π[superscript +]π[superscript −]μ[superscript +]μ[superscript −])/B(D[superscript 0]→π[superscript +]π[superscript −]ϕ(→μ[superscript +]μ[superscript −]))<0.96 at 90% confidence level. The upper limit on the absolute branching fraction is evaluated to be B(D[superscript 0]→π[superscript +]π[superscript −]μ[superscript +]μ[superscript −])<5.5 × 10[superscript −7] at 90% confidence level. This is the most stringent to date.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2013.11.053
