Interpretation of the LHCb P-c (4312)(+) Signal



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Fernández Ramírez, C. and Pilloni, A. and Albaladejo, M. and Jackura, A. and Mathieu, Vincent and Mikhasenko, M. and Silva Castro, J. A. and Szczepaniak, A. P. (2019) Interpretation of the LHCb P-c (4312)(+) Signal. Physical review letters, 123 (9). ISSN 0031-9007

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We study the nature of the new signal reported by LHCb in the J/psi p spectrum. Based on the S-matrix principles, we perform a minimum-bias analysis of the underlying reaction amplitude, focusing on the analytic properties that can be related to the microscopic origin of the P-c(4312)(+) peak. By exploring several amplitude parametrizations, we find evidence for the attractive effect of the Sigma(+)(c)(D) over bar (0) channel, which is not strong enough, however, to form a bound state.

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© 2019 American Physical Society
We thank Tomasz Skwarnicki for discussions and useful comments on the manuscript. This work was supported by the U.S. Department of Energy Grants No. DE-AC05-06OR23177 and No. DE-FG02-87ER40365, U.S. National Science Foundation Grant No. PHY-1415459, PAPIIT-DGAPA (UNAM, Mexico), Grant No. IA101819, and CONACYT (Mexico) Grants No. 734789, No. 251817, and No. A1-S-21389. V. M. acknowledges support from Comunidad Autonoma de Madrid through Programa de Atraccion de Talento Investigador.

Uncontrolled Keywords:Pentaquark states; Baryons
Subjects:Sciences > Physics
ID Code:76918
Deposited On:09 Mar 2023 08:27
Last Modified:09 Mar 2023 13:06

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