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Title: S- and p-wave structure of S = –1 meson–baryon scattering in the resonance region

Abstract

Here, we perform a simultaneous analysis of s- and p-waves of the S = –1 meson-baryon scattering amplitude using all low-energy experimental data. For the first time, differential cross section data are included for chiral unitary coupled-channel models. From this model s- and p-wave amplitudes are extracted and both well-known I( JP) = 0(1/2 -) s-wave states as well as a new I( JP) = 0(1/2 +) state absent in quark models and lattice QCD results. Multiple statistical and phenomenological tests suggest that, while the data clearly require an I = 1 p-wave resonance the new state just accounts for the absence of the decuplet Σ(1385)3/2 + in the model.

Authors:
 [1];  [1]; ORCiD logo [2]
  1. The George Washington Univ., Washington, D.C. (United States)
  2. The George Washington Univ., Washington, D.C. (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (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)
OSTI Identifier:
1488348
Alternate Identifier(s):
OSTI ID: 1489231
Report Number(s):
JLAB-THY-18-2699; DOE/OR/23177-4578; arXiv:1805.04534
Journal ID: ISSN 0370-2693; PII: S0370269318309626
Grant/Contract Number:  
AC05-06OR23177; MA 7156/1; 1415459; PHY-1452055; SC0016582
Resource Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 789; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Sadasivan, Daniel, Mai, Maxim, and Döring, Michael. S- and p-wave structure of S = –1 meson–baryon scattering in the resonance region. United States: N. p., 2018. Web. doi:10.1016/j.physletb.2018.12.035.
Sadasivan, Daniel, Mai, Maxim, & Döring, Michael. S- and p-wave structure of S = –1 meson–baryon scattering in the resonance region. United States. doi:10.1016/j.physletb.2018.12.035.
Sadasivan, Daniel, Mai, Maxim, and Döring, Michael. Wed . "S- and p-wave structure of S = –1 meson–baryon scattering in the resonance region". United States. doi:10.1016/j.physletb.2018.12.035.
@article{osti_1488348,
title = {S- and p-wave structure of S = –1 meson–baryon scattering in the resonance region},
author = {Sadasivan, Daniel and Mai, Maxim and Döring, Michael},
abstractNote = {Here, we perform a simultaneous analysis of s- and p-waves of the S = –1 meson-baryon scattering amplitude using all low-energy experimental data. For the first time, differential cross section data are included for chiral unitary coupled-channel models. From this model s- and p-wave amplitudes are extracted and both well-known I(JP) = 0(1/2-) s-wave states as well as a new I(JP) = 0(1/2+) state absent in quark models and lattice QCD results. Multiple statistical and phenomenological tests suggest that, while the data clearly require an I = 1 p-wave resonance the new state just accounts for the absence of the decuplet Σ(1385)3/2+ in the model.},
doi = {10.1016/j.physletb.2018.12.035},
journal = {Physics Letters. Section B},
number = C,
volume = 789,
place = {United States},
year = {2018},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2018.12.035

Citation Metrics:
Cited by: 1 work
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Figures / Tables:

Table 1 Table 1: Left: Parameters of the best fit. The values in parentheses behind the χ2dof show the contributions from data sets (a, b, c), respectively. The generalized variance is given by the determinant of the covariance matrix, |Σ|, and is related to the volume of the error ellipse as describedmore » in the main text. Error bars on the model parameters are determined in a re-sampling procedure. Right: Prediction of resonance parameters found in a channel of given isospin (I) and total angular momentum (J = L ± 1/2) on the second Riemann sheet, including the absolute values of the couplings to meson–baryon channels.« less

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