Observation of the decay Λ<inf>b</inf><sup>0</sup>→Λ<inf>c</inf><sup>+</sup>pp‾π<sup>−</sup>

Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A
et al (show 80 more authors) (2018) Observation of the decay Λ<inf>b</inf><sup>0</sup>→Λ<inf>c</inf><sup>+</sup>pp‾π<sup>−</sup>. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 784. 101 - 111.

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© 2018 The Author(s) The decay Λb0→Λc+pp‾π− is observed using pp collision data collected with the LHCb detector at centre-of-mass energies of s=7 and 8 Tev, corresponding to an integrated luminosity of 3 fb−1. The ratio of branching fractions between Λb0→Λc+pp‾π− and Λb0→Λc+π− decays is measured to be [Formula presented]=0.0540±0.0023±0.0032. Two resonant structures are observed in the Λc+π− mass spectrum of the Λb0→Λc+pp‾π− decays, corresponding to the Σc(2455)0 and Σc⁎(2520)0 states. The ratios of branching fractions with respect to the decay Λb0→Λc+pp‾π− are [Formula presented]=0.089±0.015±0.006,[Formula presented]=0.119±0.020±0.014. In all of the above results, the first uncertainty is statistical and the second is systematic. The phase space is also examined for the presence of dibaryon resonances. No evidence for such resonances is found.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 13 Aug 2018 07:04
Last Modified: 02 Dec 2021 08:47
DOI: 10.1016/j.physletb.2018.07.033
Open Access URL: https://doi.org/10.1016/j.physletb.2018.07.033
URI: https://livrepository.liverpool.ac.uk/id/eprint/3024845