Invariant mass distributions of B+ π− and B0 π+ 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 B0 π+ 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.

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2015). Precise Measurements of the Properties of the B1(5721)0,+ and B2*(5747)0,+ States and Observation of B+,0 π−,+ Mass Structures. JOURNAL OF HIGH ENERGY PHYSICS, 2015(4), 0-26 [10.1007/JHEP04(2015)024].

Precise Measurements of the Properties of the B1(5721)0,+ and B2*(5747)0,+ States and Observation of B+,0 π−,+ Mass Structures

L. Capriotti;CARBONE, ANGELO;GALLI, DOMENICO;MOGGI, NICCOLO';MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2015

Abstract

Invariant mass distributions of B+ π− and B0 π+ 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 B0 π+ 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.
2015
R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2015). Precise Measurements of the Properties of the B1(5721)0,+ and B2*(5747)0,+ States and Observation of B+,0 π−,+ Mass Structures. JOURNAL OF HIGH ENERGY PHYSICS, 2015(4), 0-26 [10.1007/JHEP04(2015)024].
R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/480592
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