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  • Alexander, M.; Alkhazov, G.; Aslanides, E.; Barlow, R. J.; Belous, K.; Belyaev, I.; Betancourt, C.; Bezshyiko, Ia; Bizzeti, A.; Blanc, F.; Braun, S.; Cadeddu, S.; Cai, H.; Cindolo, F.; Cogneras, E.; Cojocariu, L.; Corti, G.; Crkovská, J.; Currie, R.; D’Ambrosio, C.; Danilina, A.; De Cian, M.; Delaney, B.; Deschamps, O.; Durham, J. M.; Ek-In, S.; Falabella, A.; Fazzini, D.; Féo, M.; Fini, R. A.; Fu, J.; Galli, D.; Garcia Martin, L. M.; Golubkov, D.; Graciani Diaz, R.; Graugés, E.; Gruberg Cazon, B. R.; Guarise, M.; Hasse, C.; Hynds, D.; Ibis, P.; Jawahery, A.; Jiang, F.; Jurik, N.; Kirsebom, V. S.; Kress, F.; Kvaratskheliya, T.; Lane, J. J.; Leverington, B.; Lu, Y.; Machefert, F.; Maddrell-Mander, S.; Maltsev, T.; Mariani, S.; Materok, M.; Mauri, A.; Meadows, B.; Mikhasenko, M.; Mombächer, T.; Nakada, T.; Nikitin, N.; Nolte, N. S.; Oblakowska-Mucha, A.; Obraztsov, V.; Osborn, J. D.; Otalora Goicochea, J. M.; Popov, A.; Raven, G.; Reiss, F.; Remon Alepuz, C.; Richards, D. S.; Rinnert, K.; Rodriguez Lopez, J. A.; Rollings, A.; Ryzhikov, A.; Ryzka, J.; Schmelling, M.; Schmelzer, T.; Seuthe, A.; Siddi, B. G.; Simone, S.; Slater, M. W.; Smith, M.; Stracka, S.; Strokov, S.; Tekampe, T.; Tolk, S.; Traill, M.; Tully, A.; Vazquez Regueiro, P.; Velthuis, J. J.; Veronesi, M.; Wang, Z.; Wark, H. M.; Weiden, A.; Weisser, C.; Xu, M.; Zarebski, K. A.; Zdybal, M.; Zhang, Y.

    The journal of high energy physics, 07/2020, Letnik: 2020, Številka: 7
    Journal Article

    A bstract A precision measurement of the B c + meson mass is performed using proton- proton collision data collected with the LHCb experiment at centre-of-mass energies of 7 , 8 and 13 TeV, corresponding to a total integrated luminosity of 9 . 0 fb − 1 . The B c + mesons are reconstructed via the decays B c + → J/ψπ + , B c + → J/ψπ + π − π + , B c + → J / ψp p ¯ π + , B c + → J / ψ D s + , B c + → J/ψ D 0 K + and B c + → B s 0 π + . Combining the results of the individual decay channels, the B c + mass is measured to be 6274 . 47 ± 0 . 27 (stat) ± 0 . 17 (syst) MeV /c 2 . This is the most precise measurement of the B c + mass to date. The difference between the B c + and B s 0 meson masses is measured to be 907 . 75 ± 0 . 37 (stat) ± 0 . 27 (syst) MeV /c .