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Interpretation of the LHCb Pc(4312) Signal

High Energy Physics - Phenomenology 2019-09-04 v2 High Energy Physics - Experiment
Authors: JPAC Collaboration , C. Fernandez-Ramirez , A. Pilloni , M. Albaladejo , A. Jackura , V. Mathieu , M. Mikhasenko , J. A. Silva-Castro , A. P. Szczepaniak
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Abstract

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 Pc(4312) peak. By exploring several amplitude parametrizations, we find evidence for the attractive effect of the Sigma_c+ D0bar channel, which is not strong enough, however, to form a bound state.

Keywords

pc(4312) lhcb s-matrix reaction amplitude sigma_c d0bar bound state

Cite

@article{arxiv.1904.10021,
  title  = {Interpretation of the LHCb Pc(4312) Signal},
  author = {JPAC Collaboration and C. Fernandez-Ramirez and A. Pilloni and M. Albaladejo and A. Jackura and V. Mathieu and M. Mikhasenko and J. A. Silva-Castro and A. P. Szczepaniak},
  journal= {arXiv preprint arXiv:1904.10021},
  year   = {2019}
}

Comments

6 pages + Supplemental material. Version accepted for publication in Physical Review Letters

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