Search for the Λ<inf>b</inf><sup>0</sup> →Λη ′ and Λ<inf>b</inf><sup>0</sup> → Λη decays with the LHCb detector

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, M. AndreottiJ. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, P. d’Argent, 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, L. J. Bel, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, A. Bertolin, M. O. Bettler, M. van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Birnkraut, A. Bizzeti, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, M. Borsato, T. J.V. Bowcock, E. Bowen, C. Bozzi, S. Braun, D. Brett, M. Britsch, T. Britton, J. Brodzicka, N. H. Brook, A. Bursche, J. Buytaert, S. Cadeddu, R. Calabrese, M. Calvi, M. Calvo Gomez, P. Campana, D. Campora Perez, L. Capriotti, A. Carbone

Resultado de la investigaciónrevisión exhaustiva

9 Citas (Scopus)

Resumen

A search is performed for the as yet unobserved baryonic Λ b 0 → Λη ′ and Λ b 0 → Λη decays with 3 fb −1 of proton-proton collision data recorded by the LHCb experiment. The B 0 → K s 0η ′ decay is used as a normalisation channel. No significant signal is observed for the Λ b 0 → Λη ′ decay. An upper limit is found on the branching fraction of ℬΛb0→Λη′ < 3.1 × 10 −6 at 90% confidence level. Evidence is seen for the presence of the Λ b 0 → Λη decay at the level of 3σ significance, with a branching fraction (Formula presented.).

Idioma originalEnglish
Número de artículo6
PublicaciónJournal of High Energy Physics
Volumen2015
N.º9
DOI
EstadoPublished - 13 sep 2015
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Física nuclear y de alta energía

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