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What is the right formalism to search for resonances?, II : the pentaquark chain

Pilloni, A ; Nys, Jannes ; Mikhasenko, M ; Albaladejo, M ; Fernández-Ramírez, C ; Jackura, A ; Mathieu, V ; Sherrill, N ; Skwarnicki, T ; Szczepaniak, AP

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Título:
What is the right formalism to search for resonances?, II : the pentaquark chain
Autor: Pilloni, A ; Nys, Jannes ; Mikhasenko, M ; Albaladejo, M ; Fernández-Ramírez, C ; Jackura, A ; Mathieu, V ; Sherrill, N ; Skwarnicki, T ; Szczepaniak, AP
Assuntos: AMPLITUDES ; COLLISIONS ; GENERAL-THEORY ; PARTICLES ; Physics and Astronomy ; PION ; SINGULARITIES ; SPIN
Notas: ISSN: 1434-6052
EUROPEAN PHYSICAL JOURNAL C
ISSN: 1434-6044
Descrição: 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 Lambda b -> psi pK(-), 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.
Data de criação/publicação: 2018
Idioma: Inglês

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