© 2015 American Physical Society. Absolute γ-ray emission probabilities in the β- decay of Cu67 were measured by means of γ-ray and β - decay singles and β - γ coincidences. The new results, together with the known decay scheme of Cu67, were used to determine absolute β - decay branching intensities. The present data differ significantly from previously published values. In addition, the half-life of the Iπ=12- isomer in Zn67 was measured as T1/2=9.37(4) μs, in a good agreement with earlier measurements. From the analysis of the Fermi-Kurie plots, Qβ-(g.s.)=560.3(10) keV was deduced, which differs from the previously measured value of 577(8) keV but is in good agreement with Qβ-(g.s.)=561.3(15) keV recommended in the latest Atomic Mass Evaluation.

A search for the rare decay D0→μ+μ- is performed using a data sample, corresponding to an integrated luminosity of 0.9fb-1, of pp collisions collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The observed number of events is consistent with the background expectations and corresponds to an upper limit of B(D0→μ+μ-)<6.2(7.6)×10-9 at 90% (95%) confidence level. This result represents an improvement of more than a factor twenty with respect to previous measurements. © 2013 CERN.