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

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9 Citations (Scopus)

Abstract

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.).

Original languageEnglish
Article number6
JournalJournal of High Energy Physics
Volume2015
Issue number9
DOIs
Publication statusPublished - 13 Sep 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015, The Author(s).

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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