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  • Search for the rare decay D...
    Adrover, C.; Affolder, A.; Albrecht, J.; Alkhazov, G.; Artamonov, A.; Bauer, Th; Bay, A.; Benson, S.; Benton, J.; van Beuzekom, M.; Blusk, S.; Bondar, A.; Bowen, E.; Brook, N.H.; Camboni, A.; Cardini, A.; Corti, G.; Derkach, D.; Dettori, F.; Di Canto, A.; Dovbnya, A.; Dzhelyadin, R.; van Eijk, D.; Eisenhardt, S.; Eklund, L.; El Rifai, I.; Farinelli, C.; Filippov, S.; Francisco, O.; Gauld, R.; Golubkov, D.; Gomes, A.; Granado Cardoso, L.A.; Harnew, S.T.; Harrison, J.; Hartmann, T.; Hicks, E.; Hopchev, P.; Johnson, D.; Joram, C.; Kerzel, U.; Koppenburg, P.; Kreplin, K.; Krokovny, P.; Kruse, F.; Lambert, D.; Maciuc, F.; Marconi, U.; Martens, A.; Morello, M.J.; Muheim, F.; Muryn, B.; Naik, P.; Nguyen-Mau, C.; Nicol, M.; Niess, V.; Niet, R.; Ogilvy, S.; Okhrimenko, O.; Otalora Goicochea, J.M.; Owen, P.; Pal, B.K.; Parkes, C.; Pavel-Nicorescu, C.; Perret, P.; Pinci, D.; Polok, G.; Poluektov, A.; Powell, A.; Pritchard, A.; Rademacker, J.H.; Rakotomiaramanana, B.; Redford, S.; Rodrigues, E.; Romero Vidal, A.; Saitta, B.; Salustino Guimaraes, V.; Santamarina Rios, C.; Sarti, A.; Sciubba, A.; Seyfert, P.; Smith, M.; Spaan, B.; Spradlin, P.; Sun, L.; Szczypka, P.; Teodorescu, E.; van Tilburg, J.; Tournefier, E.; Tsaregorodtsev, A.; Valenti, G.; Vazquez Regueiro, P.; Volyanskyy, D.; Voong, D.; Vorobyev, A.; Williams, M.; Wright, S.; Zavertyaev, M.; Zhang, L.; Zhelezov, A.

    Physics letters. B, 08/2013, Volume: 725, Issue: 1-3
    Journal Article

    A search for the rare decay $D^0 \to \mu^+ \mu^-$is performed using a data sample, corresponding to an integrated luminosity of 0.9 fb$^{-1}$, 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 \mbox{${\cal B}(D^0 \to \mu^+ \mu^-) < 6.2(7.6) \times 10^{-9}$} at \mbox{90%} \mbox{(95%)} confidence level. This result represents an improvement of more than a factor twenty with respect to previous measurements.