Study of the D[superscript 0][subscript p] Amplitude in Λ[subscript b][superscript 0] → D[superscript 0] Pπ[superscript −] Decays
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Aaij2017_Article_StudyOfTheD0PAmPlitudeInΛb0D0P.pdf
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Author(s)
Boettcher, Thomas Julian
Ilten, Philip J
Williams, Michael
Date Issued
May 2017
Journal
Journal of High Energy Physics
Publisher
Springer Nature
Citation
The LHCb collaboration, et al. “Study of the D[superscript 0][subscript p] Amplitude in Λ[subscript b][superscript 0] → D[superscript 0] Pπ[superscript −] Decays.” Journal of High Energy Physics, vol. 2017, no. 5, May 2017. © 2017 The Authors.
Version
Final published version
Abstract
An amplitude analysis of the decay Λ[subscript b][superscript 0]→ D[superscript 0]pπ[superscript −] is performed in the part of the phase space containing resonances in the D[superscript 0][subscript p] channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb[superscript −1] of pp collisions recorded by the LHCb experiment. The spectrum of excited Λ[subscript c][superscript +] states that decay into D[superscript 0][subscript p] is studied. The masses, widths and quantum numbers of the Λ[subscript c](2880)[superscript +] and Λ[subscript c](2940)[superscript +] resonances are measured. The constraints on the spin and parity for the Λ[subscript c](2940)[superscript +] state are obtained for the first time. A near-threshold enhancement in the D[superscript 0][subscript p] amplitude is investigated and found to be consistent with a new resonance, denoted the Λ[subscript c](2860)[superscript +], of spin 3/2 and positive parity. Keywords: B physics, Charm physics, Hadron-Hadron scattering (experiments), QCD, Spectroscopy
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1007/JHEP05(2017)030
