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

Abstract

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.

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. Nacional Autonoma de Mexico (Mexico)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Johannes Gutenberg Univ., Mainz (Germany)
  3. Kent State Univ., Kent, OH (United States)
  4. Indiana Univ., Bloomington, IN (United States)
  5. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Indiana Univ., Bloomington, IN (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Org.:
Joint Physics Analysis Center
OSTI Identifier:
1245187
Alternate Identifier(s):
OSTI ID: 1238402
Report Number(s):
JLAB-THY-15-2152; DOE/OR/23177-3587; arXiv:1510.07065
Journal ID: ISSN 2470-0010; PRVDAQ
Grant/Contract Number:  
AC05-06OR23177; FG0287ER40365; FG02-01ER41194; PHY1415459; PHY1205019
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 93; Journal Issue: 3; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Fernández-Ramírez, Cesar, Danilkin, Igor V., Manley, D. Mark, Mathieu, Vincent, and Szczepaniak, Adam P. Coupled-channel model for K¯N scattering in the resonant region. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.93.034029.
Fernández-Ramírez, Cesar, Danilkin, Igor V., Manley, D. Mark, Mathieu, Vincent, & Szczepaniak, Adam P. Coupled-channel model for K¯N scattering in the resonant region. United States. doi:10.1103/PhysRevD.93.034029.
Fernández-Ramírez, Cesar, Danilkin, Igor V., Manley, D. Mark, Mathieu, Vincent, and Szczepaniak, Adam P. Thu . "Coupled-channel model for K¯N scattering in the resonant region". United States. doi:10.1103/PhysRevD.93.034029. https://www.osti.gov/servlets/purl/1245187.
@article{osti_1245187,
title = {Coupled-channel model for K¯N scattering in the resonant region},
author = {Fernández-Ramírez, Cesar and Danilkin, Igor V. and Manley, D. Mark and Mathieu, Vincent and Szczepaniak, Adam P.},
abstractNote = {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.},
doi = {10.1103/PhysRevD.93.034029},
journal = {Physical Review D},
number = 3,
volume = 93,
place = {United States},
year = {2016},
month = {2}
}

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