Search for the decay D[superscript 0] → π[superscript +]π[superscript -]μ[superscript +]μ[superscript -]
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...
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| Format: | Article |
| Language: | en_US |
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Elsevier
2014
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| Online Access: | http://hdl.handle.net/1721.1/87571 https://orcid.org/0000-0001-8285-3346 |
| Summary: | 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. |
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