What is the right formalism to search for resonances? II. The pentaquark chain: Joint Physics Analysis Center

A. Pilloni, J. Nys, M. Mikhasenko, M. Albaladejo, C. Fernández-Ramírez, A. Jackura, V. Mathieu, N. Sherrill, T. Skwarnicki, A. P. Szczepaniak

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

We discuss the differences between several partial-wave analysis formalisms used in the construction of three-body decay amplitudes involving fermions. Specifically, we consider the decay Λb→ψpK-, where the hidden charm pentaquark signal has been reported. We analyze the analytical properties of the amplitudes and separate kinematical and dynamical singularities. The result is an amplitude with the minimal energy dependence compatible with the S-matrix principles.

Original languageEnglish (US)
Article number727
JournalEuropean Physical Journal C
Volume78
Issue number9
DOIs
StatePublished - Sep 1 2018

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

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    Pilloni, A., Nys, J., Mikhasenko, M., Albaladejo, M., Fernández-Ramírez, C., Jackura, A., Mathieu, V., Sherrill, N., Skwarnicki, T., & Szczepaniak, A. P. (2018). What is the right formalism to search for resonances? II. The pentaquark chain: Joint Physics Analysis Center. European Physical Journal C, 78(9), [727]. https://doi.org/10.1140/epjc/s10052-018-6177-2