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  • Study of the rare decays of...
    Aaboud, M.; Barnovska, Z.; Berger, N.; Delmastro, M.; Di Ciaccio, L.; Elles, S.; Guillemin, T.; Grevtsov, K.; Hryn’ova, T.; Jézéquel, S.; Koletsou, I.; Lafaye, R.; Lévêque, Jérémy; Mastrandea, P.; Sauvage, G.; Sauvan, E.; Simard, O.; Smart, B.H.; Todorov, T.; Wingerter-Seez, I.; Yatsenko, E.; Boumediene, D.; Busato, E.; Calvet, D.; Calvet, S.; Chomont, A.R.; Donini, J.; Gris, Ph; Madar, R.; Pallin, D.; Romano Saez, S.M.; Santoni, C.; Simon, D.; Vazeille, F.; Albrand, S.; Berlendis, S.; Camincher, C.; Collot, J.; Crépé-Renaudin, S.; Delsart, P.A.; Gabaldon, C.; Genest, M.H.; Gradin, J.; Hostachy, J.Y.; Ledroit-Guillon, F.; Lleres, A.; Lucotte, A.; Malek, F.; Petit, E.; Stark, J.; Trocmé, B.; Wu, M.; Alstaty, M.; Barbero, M.; Calandri, A.; Calvet, T.P.; Coadou, Y.; Diaconu, C.; Diglio, Sara; Djama, F.; Ellajosyula, V.; Feligioni, L.; Gao, J.; Hadef, A.; Hallewell, G.D.; Hubaut, F.; Kahn, S.J.; Knoops, E. B. F. G.; Le Guirriec, E.; Liu, J.; Liu, K.; Madaffari, D.; Monnier, E.; Muanza, S.; Nagy, E.; Pralavorio, P.; Rodina, Y.; Rozanov, A.; Talby, M.; Theveneaux-Pelzer, T.; Ticse Torres, R.E.; Tisserant, S.; Toth, J.; Touchard, F.; Vacavant, L.; Wang, Chen

    The European physical journal. C, Particles and fields, 2016, Letnik: 76
    Journal Article

    A study of the decays B0→μ+μ− and B0s→μ+μ− has been performed using data corresponding to an integrated luminosity of 25 fb−1 of 7 TeV and 8 TeV proton--proton collisions collected with the ATLAS detector during the LHC Run 1. For B0, an upper limit on the branching fraction is set at B(B0→μ+μ−)<4.2×10−10 at 95% confidence level. For B0s, the branching fraction B(B0s→μ+μ−)=(0.9+1.1−0.8)×10−9 is measured. The results are consistent with the Standard Model expectation with a p-value of 4.8%, corresponding to 2.0 standard deviations.