Study of η − η<sup>′</sup> mixing from measurement of B <inf>(s)</inf><sup>0</sup> → J/ψη<sup>(′)</sup> decay rates

The LHCb collaboration, 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. AndersonR. Andreassen, M. 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, C. Baesso, 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, A. B. Bertolin, 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, D. Brett, M. Britsch, T. Britton, J. Brodzicka, N. H. Brook, H. Brown, A. Bursche, J. Buytaert, S. Cadeddu, R. Calabrese, M. Calvi, M. Calvo Gomez

Resultado de la investigaciónrevisión exhaustiva

13 Citas (Scopus)

Resumen

Abstract: A study of B and B s meson decays into J/ψ η and J/ψ η final states is performed using a data set of proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, collected by the LCHb experiment and corresponding to 3.0 fb −1 of integrated luminosity. The decay B 0 → J/ψ η is observed for the first time. The following ratios of branching fractions are measured: (Formula Presented) where the third uncertainty is related to the present knowledge of f s/f d, the ratio between the probabilities for a b quark to form a B s or a B 0 meson. The branching fraction ratios are used to determine the parameters of η − η meson mixing. In addition, the first evidence for the decay B s → ψ(2S)η is reported, and the relative branching fraction is measured, (Formula Presented) where the third uncertainty is due to the limited knowledge of the branching fractions of J/ψ and ψ(2S) mesons.

Idioma originalEnglish
Número de artículo24
Páginas (desde-hasta)1-24
Número de páginas24
PublicaciónJournal of High Energy Physics
Volumen2015
N.º1
DOI
EstadoPublished - 1 ene 2015
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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