Search for the decay D0 to π+ π- μ+ μ-

Journal article

A search for the D0 to \pi+ \pi- \mu+ \mu- 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-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 to \pi+ \pi- \phi(to \mu+ \mu-), under the assumption of a phase-space model, is found to be B(D0 to \pi+ \pi- mu+ mu-)/B(D0 to \pi+ \pi- \phi(to \mu+ \mu-)) < 0.96 at the 90% confidence level. The upper limit on the absolute branching fraction is evaluated to be B(D0 to \pi+ \pi- \mu+ \mu-) < 5.5 x 10-7 at 90% confidence level. This is the most stringent to date.

Authors: collaboration, L; Aaij, R; Adeva, B; Adinolfi, M; Adrover, C

• Publication status: Published
• Journal: Physics Letters B (2014) pp. 234-243
• Volume: 87
• Issue: 24
• Pages: 234-243
• Publication date: 2013-10-09
• DOI: 10.1016/j.physletb.2013.11.053
• EISSN: 1079-7114
• ISSN: 0031-9007
• Keywords: hep-ex