Measurements of B-c(+) Production and Mass with the B-c(+) -> J/psi pi(+) Decay

Aaij, R.; Abellan Beteta, C.; Adametz, A.; Adeva, B.; Adinolfi, M.; Adrover, C.; Affolder, A.; Ajaltouni, Z.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Amato, S.; Amhis, Y.; Anderlini, L.; Anderson, J.; Appleby, R. B.; Gutierrez, O. Aquines; Archilli, F.; Artamonov, A.; Artuso, M.; Aslanides, E.; Auriemma, G.; Bachmann, S.; Back, J. J.; Baesso, C.; Baldini, W.; Barlow, R. J.; Barschel, C.; Barsuk, S.; Barter, W.; Bates, A.; Bauer, Th.; Bay, A.; Beddow, J.; Bediaga, I.; Belogurov, S.; Belous, K.; Belyaev, I.; Ben-Haim, E.; Benayoun, M.; Bencivenni, G.; Benson, S.; Benton, J.; Berezhnoy, A.; Bernet, R.; Bettler, M-O.; Van Beuzekom, M.; Bien, A.; Bifani, S.; Bird, T.; Bizzeti, A.; Bjornstad, P. M.; Blake, T.; Blanc, F.; Blanks, C.; Blouw, J.; Blusk, S.; Bobrov, A.; Bocci, V.; Bondar, A.; Bondar, N.; Bonivento, W.; Borghi, S.; Borgia, A.; Bowcock, T. J. V.; Bozzi, C.; Brambach, T.; Van Den Brand, J.; Bressieux, J.; Brett, D.; Britsch, M.; Britton, T.; Brook, N. H.; Brown, H.; Buechler-Germann, A.; Burducea, I.; Bursche, A.; Buytaert, J.; Cadeddu, S.; Callot, O.; Calvi, M.; Calvo Gomez, M.; Camboni, A.; Campana, P.; Carbone, A.; Carboni, G.; Cardinale, R.; Cardini, A.; Carson, L.; Carvalho Akiba, K.; Casse, G.; Cattaneo, M.; Cauet, Ch.; Charles, M.; Charpentier, Ph.; Chen, P.; Chiapolini, N.; et al.

doi:10.1103/PhysRevLett.109.232001

research article

Measurements of B-c(+) Production and Mass with the B-c(+) -> J/psi pi(+) Decay

Aaij, R.

•

Abellan Beteta, C.

•

Adametz, A.

2012

Physical Review Letters

Measurements of B-c(+) production and mass are performed with the decay mode B-c(+) -> J/psi pi(+) using 0.37 fb(-1) of data collected in pp collisions at root s = 7 TeV by the LHCb experiment. The ratio of the production cross section times branching fraction between the B-c(+) -> J/psi pi(+) and the B+ -> J/psi K+ decays is measured to be (0.68 +/- 0.10(stat) +/- 0.03(syst) +/- 0.05(lifetime))% for B-c(+) and B+ mesons with transverse momenta p(T) > 4 GeV/c and pseudorapidities 2.5 < eta < 4.5. The B-c(+) mass is directly measured to be 6273.7 +/- 1.3(stat) +/- 1.6(syst) MeV/c(2), and the measured mass difference with respect to the B+ meson is M(B-c(+)) - M(B+) = 994.6 +/- 1.3(stat) +/- 0.6(syst) MeV/c(2).