TY - JOUR
T1 - What is the right formalism to search for resonances? II. The pentaquark chain
T2 - Joint Physics Analysis Center
AU - Pilloni, A.
AU - Nys, J.
AU - Mikhasenko, M.
AU - Albaladejo, M.
AU - Fernández-Ramírez, C.
AU - Jackura, A.
AU - Mathieu, V.
AU - Sherrill, N.
AU - Skwarnicki, T.
AU - Szczepaniak, A. P.
N1 - Publisher Copyright:
© 2018, The Author(s).
PY - 2018/9/1
Y1 - 2018/9/1
N2 - 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.
AB - 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.
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U2 - 10.1140/epjc/s10052-018-6177-2
DO - 10.1140/epjc/s10052-018-6177-2
M3 - Article
AN - SCOPUS:85053066732
SN - 1434-6044
VL - 78
JO - European Physical Journal C
JF - European Physical Journal C
IS - 9
M1 - 727
ER -