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Aiola, S.; Alvarez Cartelle, P.; Artamonov, A.; Balagura, V.; Battig, A.; Benson, S.; Betancourt, C.; Bizzeti, A.; Blanc, F.; Borisyak, M.; Camargo Magalhaes, P.; Carboni, G.; Cattaneo, M.; Cerasoli, J.; Chefdeville, M.; Coelho, J. A. B.; Contu, A.; Crocombe, A.; d’Argent, P.; de Vries, J. A.; Decamp, D.; Dobishuk, V.; Douglas, L.; Dutta, D.; Dziewiecki, M.; Eklund, L.; Evans, T.; Fernandez Prieto, A.; Ferreira Rodrigues, F.; Fischer, K. M.; Gallorini, S.; Gersabeck, M.; Ghez, Ph; Gizdov, K.; Golobardes, E.; Golubkov, D.; Grammatico, T.; Graugés, E.; Guarise, M.; Guth, A.; Haen, C.; Harnew, N.; Henry, L.; Hopchev, P. H.; Hunter, R. J.; Hynds, D.; Kandybei, S.; Kim, K. E.; Lane, J. J.; Li, Y.; Lopes, J. H.; Machefert, F.; Mackowiak, P.; Malecki, B.; Marangotto, D.; Marinangeli, M.; Martellotti, G.; McNulty, R.; Milanes, D. A.; Mukherjee, M.; Nakada, T.; Nolte, N. S.; Ovsiannikova, T.; Pappenheimer, C.; Passaleva, G.; Petridis, K.; Petruzzo, M.; Pinzino, J.; Poli Lener, M.; Poluektov, A.; Pomery, G. J.; Popov, A.; Pullen, H.; Qian, W.; Ruf, T.; Ryzka, J.; Saborido Silva, J. J.; Sanchez Mayordomo, C.; Santacesaria, R.; Sarpis, M.; Scantlebury Smead, L. G.; Schmelzer, T.; Schubiger, M.; Sciascia, B.; Skwarnicki, T.; Stahl, S.; Stone, S.; Tully, A.; Valenti, G.; Van Hecke, H.; Vecchi, S.; Velthuis, J. J.; Vitali, G.; Voropaev, N.; Weiden, A.; Xu, J.; Yao, Y.; Zhang, S.; Zhang, W. C.; Zhou, X.
The journal of high energy physics, 07/2020, Letnik: 2020, Številka: 7Journal Article
A bstract A precision measurement of the $$ {B}_c^{+} $$ 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 $$ {B}_c^{+} $$ B c + mesons are reconstructed via the decays $$ {B}_c^{+} $$ B c + → J/ψπ + , $$ {B}_c^{+} $$ B c + → J/ψπ + π − π + , $$ {B}_c^{+}\to J/\psi p\overline{p}{\pi}^{+} $$ B c + → J / ψp p ¯ π + , $$ {B}_c^{+}\to J/\psi {D}_s^{+} $$ B c + → J / ψ D s + , $$ {B}_c^{+} $$ B c + → J/ψ D 0 K + and $$ {B}_c^{+}\to {B}_s^0{\pi}^{+} $$ B c + → B s 0 π + . Combining the results of the individual decay channels, the $$ {B}_c^{+} $$ 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 $$ {B}_c^{+} $$ B c + mass to date. The difference between the $$ {B}_c^{+} $$ B c + and $$ {B}_s^0 $$ B s 0 meson masses is measured to be 907 . 75 ± 0 . 37 (stat) ± 0 . 27 (syst) MeV /c .
