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oai:recercat.cat:2445/1864252025-12-05T16:41:18Zcom_2072_1057col_2072_478823col_2072_478917

Evidence for the two-body charmless baryonic decay {B}+\to p\overline{Λ} Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José LHCb Collaboration Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments A search for the rare two-body charmless baryonic decay {B}+\to p\overline{Λ} is performed with pp collision data, corresponding to an integrated luminosity of 3 fb-1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. An excess of {B}+\to p\overline{Λ} candidates with respect to background expectations is seen with a statistical significance of 4.1 standard deviations, and constitutes the first evidence for this decay. The branching fraction, measured using the B + → K S 0 π + decay for normalisation, is {B}({B}+\to p\overline{Λ})=(2.{4}_{-0.8}^{+1.0}± 0.3)× 1{0}^{-7}, where the first uncertainty is statistical and the second systematic. 2022-06-07T16:05:43Z 2022-06-07T16:05:43Z 2017-04 2022-06-07T16:05:44Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1126-6708 https://hdl.handle.net/2445/186425 677987 eng Reproducció del document publicat a: https://doi.org/10.1007/JHEP04(2017)162 Journal of High Energy Physics, 2017, vol. 2017, num. 162, p. 18 https://doi.org/10.1007/JHEP04(2017)162 cc-by (c) Camboni, Alessandro et al., 2017 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess 18 p. application/pdf Springer Verlag Articles publicats en revistes (Física Quàntica i Astrofísica)