Molecular interpretation of the and states
Abstract
A molecular model of the and LHCb states is proposed. The model relies on channels coupled by long-range pion-exchange dynamics with features that depend crucially on the novel addition of the Λc(2595)¯ D channel. A striking prediction of the model is the unusual combination of quantum numbers JP(4457) = 1/2+ and JP(4440) = 3/2–. Unlike in other models, a simultaneous description of both states is achieved without introducing additional short-range interactions. The model also gives a natural explanation for the relative widths of the states. We show that the usual molecular scenarios cannot explain the production rate of Pc states in Λb decays and that this can be resolved by including Λc(2595)D¯ and related channels. Experimental tests and other states are discussed in the conclusions.
- Authors:
- Publication Date:
- Research Org.:
- Swansea Univ. (United Kingdom)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1580142
- Alternate Identifier(s):
- OSTI ID: 1595996
- Grant/Contract Number:
- SC0019232
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 100 Journal Issue: 11; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Burns, T. J., and Swanson, E. S. Molecular interpretation of the P c ( 4440 ) and P c ( 4457 ) states. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.100.114033.
Burns, T. J., & Swanson, E. S. Molecular interpretation of the P c ( 4440 ) and P c ( 4457 ) states. United States. https://doi.org/10.1103/PhysRevD.100.114033
Burns, T. J., and Swanson, E. S. Fri .
"Molecular interpretation of the P c ( 4440 ) and P c ( 4457 ) states". United States. https://doi.org/10.1103/PhysRevD.100.114033.
@article{osti_1580142,
title = {Molecular interpretation of the P c ( 4440 ) and P c ( 4457 ) states},
author = {Burns, T. J. and Swanson, E. S.},
abstractNote = {A molecular model of the Pc(4457) and Pc(4457) LHCb states is proposed. The model relies on channels coupled by long-range pion-exchange dynamics with features that depend crucially on the novel addition of the Λc(2595)¯ D channel. A striking prediction of the model is the unusual combination of quantum numbers JP(4457) = 1/2+ and JP(4440) = 3/2–. Unlike in other models, a simultaneous description of both states is achieved without introducing additional short-range interactions. The model also gives a natural explanation for the relative widths of the states. We show that the usual molecular scenarios cannot explain the production rate of Pc states in Λb decays and that this can be resolved by including Λc(2595)D¯ and related channels. Experimental tests and other states are discussed in the conclusions.},
doi = {10.1103/PhysRevD.100.114033},
journal = {Physical Review D},
number = 11,
volume = 100,
place = {United States},
year = {2019},
month = {12}
}
https://doi.org/10.1103/PhysRevD.100.114033
Web of Science
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