Interpretation of the LHCbPc(4312)+Signal

2019/04/30 by César Fernández Ramírez, JPAC Collaboration, C. Fernandez-Ramirez +10
Physics and Astronomy · #Amplitude #Computer science #High-Energy Particle Collisions Research #Interpretation (philosophy) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevlett.123.092001

published as Phys. Rev. Lett. 123, 092001 (2019) · 6 pages + Supplemental material. Version accepted for publication in Physical Review Letters

arxiv created 2019/08/23 · openalex publication_date 2019/08/29 · arxiv updated 2019/09/04 · openalex created_date 2019/09/05 · openalex updated_date 2026/08/06

Abstract

We study the nature of the new signal reported by LHCb in the J/ψp 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 Σ_c⁺D[over ¯]⁰ channel, which is not strong enough, however, to form a bound state.

Citations

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