Abstract: 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 B2(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.[Figure not available: see fulltext.]

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Precise measurements of the properties of the B1(5721)0,+ and B2*(5747)0,+ states and observation of B +,0π−,+ mass structures. JOURNAL OF HIGH ENERGY PHYSICS, 2015(4) [10.1007/JHEP04(2015)024].

Precise measurements of the properties of the B1(5721)0,+ and B2*(5747)0,+ states and observation of B +,0π−,+ mass structures

Borsato, M;CALVI, MARTA;CARNITI, PAOLO;CASSINA, LORENZO;GOTTI, CLAUDIO;KHANJI, BASEM;Martinelli, M;MATTEUZZI, CLARA;
2015

Abstract

Abstract: 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 B2(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.[Figure not available: see fulltext.]
Articolo in rivista - Articolo scientifico
B physics; Flavor physics; Hadron-Hadron Scattering; QCD; Spectroscopy; Nuclear and High Energy Physics
English
2015
2015
4
24
open
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Precise measurements of the properties of the B1(5721)0,+ and B2*(5747)0,+ states and observation of B +,0π−,+ mass structures. JOURNAL OF HIGH ENERGY PHYSICS, 2015(4) [10.1007/JHEP04(2015)024].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/154283
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