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Article
Report number arXiv:1502.02638 ; LHCB-PAPER-2014-067 ; CERN-PH-EP-2015-021 ; LHCB-PAPER-2014-067 ; CERN-PH-EP-2015-021
Title Precise measurements of the properties of the B1(5721)0,+ and B2(5747)0,+ states and observation of B+,0π,+ mass structures
Author(s) LHCb collaboration  709 人のオーサーを表示
Publication 2015-04-07
Imprint 09 Feb 2015
Number of pages 29
Note 29 pages, 5 Figures, 8 Tables
In: JHEP 04 (2015) 024
DOI 10.1007/JHEP04(2015)024
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; QCD ; B physics ; spectroscopy
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 3.0fb1 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.
Related document supersedes: LHCb-CONF-2011-053
Copyright/License SCOAP3: (License: CC-BY-4.0), sponsored by SCOAP³
preprint: © 2015-2024 CERN (License: CC-BY-4.0)
publication: © 2015-2024 CERN



Corresponding record in: Inspire
Email contact: cindy.denis@cern.ch


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