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Title: Molecular interpretation of the P c (4440) and P c (4457) states

Journal Article · · Physical Review. D.

A molecular model of the P c (4457) and P c (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.

Research Organization:
Swansea Univ. (United Kingdom); Univ. of Pittsburgh, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0019232
OSTI ID:
1580142
Alternate ID(s):
OSTI ID: 1595996; OSTI ID: 1965292
Journal Information:
Physical Review. D., Vol. 100, Issue 11; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 62 works
Citation information provided by
Web of Science

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