2026-04-18T07:15:04Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1857192025-12-05T16:38:06Zcom_2072_1057col_2072_478823col_2072_478917

Precise measurements of the properties of the B 1(5721)0 ,+ and B {2/*}(5747)0,+ states and observation of B + ,0 π - ,+ mass structures Badalov, A. Casanova Mohr, R. Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Mann Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José Ruiz, Hugo (Ruiz Pérez) LHCb Collaboration Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments Invariant mass distributions of B+π − and B0π + combinations are investigated in order to study excited B mesons. The analysis is based on a data sample corresponding to 3.0 fb−1 of pp collision data, recorded by the LHCb detector at centre-of-mass energies of 7 and 8 TeV. Precise measurements of the masses and widths of the B1(5721)0,+ and B∗ 2 (5747)0,+ states are reported. Clear enhancements, particularly prominent at high pion transverse momentum, are seen over background in the mass range 5850-6000 MeV in both B+π − and B0π + combinations. The structures are consistent with the presence of four excited B mesons, labelled BJ (5840)0,+ and BJ (5960)0,+, whose masses and widths are obtained under different hypotheses for their quantum numbers. 2022-05-17T15:21:49Z 2022-05-17T15:21:49Z 2015-04-07 2022-05-17T15:21:49Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1126-6708 https://hdl.handle.net/2445/185719 656801 eng Reproducció del document publicat a: https://doi.org/10.1007/JHEP04(2015)024 Journal of High Energy Physics, 2015, vol. 2015, num. 24, p. 1-30 https://doi.org/10.1007/JHEP04(2015)024 cc-by (c) Badalov, A. et al., 2015 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess 30 p. application/pdf Springer Verlag Articles publicats en revistes (Física Quàntica i Astrofísica)