Search for the Λb0 →Λη ′ and Λb0 → Λη decays with the LHCb detector

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Aaij, R, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S et al (show 89 more authors) , Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Anderson, J, Andreotti, M, Andrews, JE, Appleby, RB, Aquines Gutierrez, O, Archilli, F, d’Argent, P, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Batozskaya, V, Battista, V, Bay, A, Beaucourt, L, Beddow, J, Bedeschi, F, Bediaga, I, Bel, LJ, Belyaev, I, Ben-Haim, E, Bencivenni, G, Benson, S, Benton, J, Berezhnoy, A, Bernet, R, Bertolin, A, Bettler, MO, van Beuzekom, M, Bien, A, Bifani, S, Bird, T, Birnkraut, A, Bizzeti, A, Blake, T, Blanc, F, Blouw, J, Blusk, S, Bocci, V, Bondar, A, Bondar, N, Bonivento, W, Borghi, S, Borsato, M, Bowcock, TJV ORCID: 0000-0002-3505-6915, Bowen, E, Bozzi, C, Braun, S, Brett, D, Britsch, M, Britton, T, Brodzicka, J, Brook, NH, Bursche, A, Buytaert, J, Cadeddu, S, Calabrese, R, Calvi, M, Calvo Gomez, M, Campana, P, Campora Perez, D, Capriotti, L, Carbone, A, Carboni, G, Cardinale, R, Cardini, A, Carniti, P, Carson, L, Carvalho Akiba, K, Casanova Mohr, R and Casse, G ORCID: 0000-0002-8516-237X (2015) Search for the Λb0 →Λη ′ and Λb0 → Λη decays with the LHCb detector Journal of High Energy Physics, 2015 (9). 006-. ISSN 1126-6708, 1029-8479

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Abstract

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

Item Type:	Article
Additional Information:	22 pages, 6 figures. v2 is published version (very minor revisions)
Uncontrolled Keywords:	Hadron-Hadron Scattering, B physics, Flavor physics
Depositing User:	Symplectic Admin
Date Deposited:	08 Jul 2016 09:13
Last Modified:	22 Jan 2026 07:34
DOI:	10.1007/JHEP09(2015)006
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3002188
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