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Precise measurements of the properties of the B[subscript 1](5721)[superscript 0,+] and B[* over 2](5747)[superscript 0,+] states and observation of B[superscript +,0]π[superscript −,+] mass structures

Author(s)
Counts, Ian Thomas Hunt; Ilten, Philip James; Williams, Michael
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Abstract
Invariant mass distributions of B[superscript +]π[superscript −] and B[superscript 0]π[superscript +] combinations are investigated in order to study excited B mesons. The analysis is based on a data sample corresponding to 3.0 fb[superscript −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 B[subscript 1](5721)[superscript 0,+] and B[superscript 2](5747)[superscript 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[superscript +]π[superscript −] and B[superscript 0]π[superscript +] combinations. The structures are consistent with the presence of four excited B mesons, labelled B[subscript J](5840)[superscript 0,+] and B[subscript J](5960)[superscript 0,+], whose masses and widths are obtained under different hypotheses for their quantum numbers.
Date issued
2015-04
URI
http://hdl.handle.net/1721.1/98240
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Aaij, R., B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, et al. “Precise Measurements of the Properties of the B[subscript 1](5721)[superscript 0,+] and B[* over 2](5747)[superscript 0,+] States and Observation of B[superscript +,0]π[superscript −,+] Mass Structures.” J. High Energ. Phys. 2015, no. 4 (April 2015). © 2015 CERN, for the benefit of the LHCb Collaboration
Version: Final published version
ISSN
1029-8479
1126-6708

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