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

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

doi:10.1140/epjc/s10052-018-6177-2

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

Journal Article · Sat Sep 08 00:00:00 EDT 2018 · European Physical Journal. C, Particles and Fields

DOI:https://doi.org/10.1140/epjc/s10052-018-6177-2· OSTI ID:1469218

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

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 $Λ_{b} \to ψ p K^{-}$ , 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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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Indiana Univ., Bloomington, IN (United States); Univ. of Bonn (Germany); National Autonomous Univ. of Mexico, Mexico City (Mexico); Ghent Univ. (Belgium); Univ. of Murcia (Spain)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); German Federal Ministry of Education and Research (BMBF); National Autonomous Univ. of Mexico (UNAM); National Council of Science and Technology (CONACYT) (Mexico); Research Foundation - Flanders (FWO) (Belgium); Ministry of Economy and Enterprise (MINECO) (Spain)

Grant/Contract Number:: AC05-06OR23177; FG02-87ER40365; IA101717; 251817; PHY-1507572; PHY-1415459; PHY-1205019; FPA2016-77313-P

OSTI ID:: 1469218

Alternate ID(s):: OSTI ID: 1472279

Report Number(s):: JLAB-THY-18-2700; DOE/OR/23177-4548; arXiv:1805.02113; 727; PII: 6177

Journal Information:: European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Vol. 78 Journal Issue: 9; ISSN 1434-6044

Publisher:: Springer Science + Business MediaCopyright Statement

Country of Publication:: Germany

Language:: English

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Cited by: 6 works

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References (27)

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