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

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28 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number152003
JournalPhysical Review Letters
Volume113
Issue number15
DOIs
Publication statusPublished - 10 Oct 2014
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2014 CERN, for the LHCb Collaboration.

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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