Coupled-channel model for K¯N scattering in the resonant region

Fernández-Ramírez, Cesar; Danilkin, Igor V.; Manley, D. Mark; Mathieu, Vincent; Szczepaniak, Adam P.

doi:10.1103/PhysRevD.93.034029

Title: Coupled-channel model for $\bar{K} N$ scattering in the resonant region

Journal Article · Thu Feb 18 00:00:00 EST 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.93.034029· OSTI ID:1245187

Fernández-Ramírez, Cesar ^[1]; Danilkin, Igor V. ^[2]; Manley, D. Mark ^[3]; Mathieu, Vincent ^[4]; Szczepaniak, Adam P. ^[5]

Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. Nacional Autonoma de Mexico (Mexico)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Johannes Gutenberg Univ., Mainz (Germany)
Kent State Univ., Kent, OH (United States)
Indiana Univ., Bloomington, IN (United States)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Indiana Univ., Bloomington, IN (United States)

Here, we present a unitary multichannel model for $$\bar{K}$$N scattering in the resonance region that fulfills unitarity. It has the correct analytical properties for the amplitudes once they are extended to the complex-$$s$$ plane and the partial waves have the right threshold behavior. In order to determine the parameters of the model, we have fitted single-energy partial waves up to J = 7/2 and up to 2.15 GeV of energy in the center-of-mass reference frame obtaining the poles of the Λ* and Σ* resonances, which are compared to previous analyses. Furthermore, we provide the most comprehensive picture of the S = –1 hyperon spectrum to date. Here, important differences are found between the available analyses making the gathering of further experimental information on $$\bar{K}$$N scattering mandatory to make progress in the assessment of the hyperon spectrum.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: Joint Physics Analysis Center

Grant/Contract Number:: AC05-06OR23177; FG0287ER40365; FG02-01ER41194; PHY1415459; PHY1205019

OSTI ID:: 1245187

Alternate ID(s):: OSTI ID: 1238402

Report Number(s):: JLAB-THY-15-2152; DOE/OR/23177-3587; arXiv:1510.07065; PRVDAQ

Journal Information:: Physical Review D, Vol. 93, Issue 3; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 39 works

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