First observation of a baryonic B<sup>+</sup><inf>c</inf> decay

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. Anderson, R. AndreassenM. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, V. Battista, A. Bay, L. Beaucourt, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, M. O. Bettler, M. Van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, M. Borsato, T. J.V. Bowcock, E. Bowen, C. Bozzi, T. Brambach, J. Van Den Brand, J. Bressieux, D. Brett, M. Britsch, T. Britton, J. Brodzicka, N. H. Brook, H. Brown, A. Bursche, G. Busetto, J. Buytaert, S. Cadeddu, R. Calabrese, M. Calvi

Resultado de la investigaciónrevisión exhaustiva

28 Citas (Scopus)

Resumen

A baryonic decay of the B + c meson, B + c → J/ψpp¯π +, is observed for the first time, with a significance of 7.3 standard deviations, in pp collision data collected with the LHCb detector and corresponding to an integrated luminosity of 3.0 fb -1 taken at center-of-mass energies of 7 and 8 TeV. With the B + c → J/ψπ + decay as the normalization channel, the ratio of branching fractions is measured to be B(B + c → J/ψpp¯π +)/B(B + c → J/ψπ +) = 0.143 +0.039 -0.034(stat) ± 0.013(syst). The mass of the B + c meson is determined as M(B + c) = 6274.0 ± 1.8(stat) ± 0.4(syst) MeV/c 2, using the B + c → J/ψpp¯π + channel.

Idioma originalEnglish
Número de artículo152003
PublicaciónPhysical Review Letters
Volumen113
N.º15
DOI
EstadoPublished - 10 oct 2014
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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