Search for the decay D0→π+π−μ+μ−

LHCb Collaboration; Aaij, R; Adeva, B; Adinolfi, M; et al; Bernet, R; Müller, K; Steinkamp, O; Straumann, U; Vollhardt, A (2014). Search for the decay D0→π+π−μ+μ−. Physics Letters B, 728:234-343.

Abstract

A search for the D0→π+π−μ+μ− decay, where the muon pair does not originate from a resonance, is performed using proton–proton collision data corresponding to an integrated luminosity of 1.0fb−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 D0→π+π−ϕ(→μ+μ−), under the assumption of a phase-space model, is found to be B(D0→π+π−μ+μ−)/B(D0→π+π−ϕ(→μ+μ−))<0.96 Turn MathJax off at 90% confidence level. The upper limit on the absolute branching fraction is evaluated to be B(D0→π+π−μ+μ−)<5.5×10−7 at 90% confidence level. This is the most stringent to date.

Abstract

A search for the D0→π+π−μ+μ− decay, where the muon pair does not originate from a resonance, is performed using proton–proton collision data corresponding to an integrated luminosity of 1.0fb−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 D0→π+π−ϕ(→μ+μ−), under the assumption of a phase-space model, is found to be B(D0→π+π−μ+μ−)/B(D0→π+π−ϕ(→μ+μ−))<0.96 Turn MathJax off at 90% confidence level. The upper limit on the absolute branching fraction is evaluated to be B(D0→π+π−μ+μ−)<5.5×10−7 at 90% confidence level. This is the most stringent to date.

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Item Type: Journal Article, refereed, original work 07 Faculty of Science > Physics Institute 530 Physics German 2014 05 Feb 2014 16:23 21 Nov 2017 17:11 Elsevier 0370-2693 https://doi.org/10.1016/j.physletb.2013.11.053