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 - Funding Information:
J.N. would like to thank Igor Danilkin for bringing Refs. [35 –37] to our attention. This work was supported by BMBF, the U.S. Department of Energy under grants No. DE-AC05-06OR23177 and No. DE-FG02-87ER40365, PAPIIT-DGAPA (UNAM, Mexico) grant No. IA101717, CONACYT (Mexico) grant No. 251817, Research Foundation – Flanders (FWO), U.S. National Science Foundation under award numbers PHY-1507572, PHY-1415459 and PHY-1205019, and Ministerio de Economía y Competitividad (Spain) through grant No. FPA2016-77313-P.
Funding Information:
Acknowledgements J.N. would like to thank Igor Danilkin for bringing Refs. [35–37] to our attention. This work was supported by BMBF, the U.S. Department of Energy under grants No. DE-AC05-06OR23177 and No. DE-FG02-87ER40365, PAPIIT-DGAPA (UNAM, Mexico) grant No. IA101717, CONACYT (Mexico) grant No. 251817, Research Foundation – Flanders (FWO), U.S. National Science Foundation under award numbers PHY-1507572, PHY-1415459 and PHY-1205019, and Ministerio de Economía y Competitividad (Spain) through grant No. FPA2016-77313-P.
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 -