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

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

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 extracte...

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Main Authors: D. Sadasivan, M. Mai, M. Döring
Format: Article
Language:English
Published: Elsevier 2019-02-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269318309626
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spelling doaj-7977662326e14dbaaab4d7d9ed38665e2020-11-25T02:49:38ZengElsevierPhysics Letters B0370-26932019-02-01789329335S- and p-wave structure of S = −1 meson–baryon scattering in the resonance regionD. Sadasivan0M. Mai1M. Döring2Institute for Nuclear Studies and Department of Physics, The George Washington University, Washington, DC 20052, USA; Corresponding author.Institute for Nuclear Studies and Department of Physics, The George Washington University, Washington, DC 20052, USAInstitute for Nuclear Studies and Department of Physics, The George Washington University, Washington, DC 20052, USA; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAWe 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 we observe both well-known I(JP)=0(1/2−) s-wave states as well as a new I(JP)=1(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.http://www.sciencedirect.com/science/article/pii/S0370269318309626
collection DOAJ
language English
format Article
sources DOAJ
author D. Sadasivan
M. Mai
M. Döring
spellingShingle D. Sadasivan
M. Mai
M. Döring
S- and p-wave structure of S = −1 meson–baryon scattering in the resonance region
Physics Letters B
author_facet D. Sadasivan
M. Mai
M. Döring
author_sort D. Sadasivan
title S- and p-wave structure of S = −1 meson–baryon scattering in the resonance region
title_short S- and p-wave structure of S = −1 meson–baryon scattering in the resonance region
title_full S- and p-wave structure of S = −1 meson–baryon scattering in the resonance region
title_fullStr S- and p-wave structure of S = −1 meson–baryon scattering in the resonance region
title_full_unstemmed S- and p-wave structure of S = −1 meson–baryon scattering in the resonance region
title_sort s- and p-wave structure of s = −1 meson–baryon scattering in the resonance region
publisher Elsevier
series Physics Letters B
issn 0370-2693
publishDate 2019-02-01
description 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 we observe both well-known I(JP)=0(1/2−) s-wave states as well as a new I(JP)=1(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.
url http://www.sciencedirect.com/science/article/pii/S0370269318309626
work_keys_str_mv AT dsadasivan sandpwavestructureofs1mesonbaryonscatteringintheresonanceregion
AT mmai sandpwavestructureofs1mesonbaryonscatteringintheresonanceregion
AT mdoring sandpwavestructureofs1mesonbaryonscatteringintheresonanceregion
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