Structure of the nucleon's low-lying excitations

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dc.contributor.authorChen, Chen [UNESP]
dc.contributor.authorEl-Bennich, Bruno
dc.contributor.authorRoberts, Craig D.
dc.contributor.authorSchmidt, Sebastian M.
dc.contributor.authorSegovia, Jorge
dc.contributor.authorWan, Shaolong
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Cruzeiro Sul
dc.contributor.institutionArgonne Natl Lab
dc.contributor.institutionForschungszentrum Julich
dc.contributor.institutionJARA
dc.contributor.institutionUniv Autonoma Barcelona
dc.contributor.institutionUniv Sci & Technol China
dc.date.accessioned2019-10-04T12:30:16Z
dc.date.available2019-10-04T12:30:16Z
dc.date.issued2018-02-15
dc.description.abstractA continuum approach to the three valence-quark bound-state problem in quantum field theory is used to perform a comparative study of the four lightest (I = 1/2; J(P) = 1/2(+/-)) thorn baryon isospin doublets in order to elucidate their structural similarities and differences. Such analyses predict the presence of nonpointlike, electromagnetically active quark-quark (diquark) correlations within all baryons; and in these doublets, isoscalar-scalar, isovector-pseudovector, isoscalar-pseudoscalar, and vector diquarks can all play a role. In the two lightest (1/2, 1/2(+)) doublets, however, scalar and pseudovector diquarks are overwhelmingly dominant. The associated rest-frame wave functions are largely S-wave in nature; and the first excited state in this 1/2(+) channel has the appearance of a radial excitation of the ground state. The two lightest (1/2, 1/2(-)) doublets fit a different picture: accurate estimates of their masses are obtained by retaining only pseudovector diquarks; in their rest frames, the amplitudes describing their dressed-quark cores contain roughly equal fractions of even-and odd-parity diquarks; and the associated wave functions are predominantly P-wave in nature, but possess measurable S-wave components. Moreover, the first excited state in each negative-parity channel has little of the appearance of a radial excitation. In quantum field theory, all differences between positive-and negative-parity channels must owe to chiral symmetry breaking, which is overwhelmingly dynamical in the light-quark sector. Consequently, experiments that can validate the contrasts drawn herein between the structure of the four lightest (1/2, 1/2(+/-)) thorn doublets will prove valuable in testing links between emergent mass generation and observable phenomena and, plausibly, thereby revealing dynamical features of confinement.en
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz 271, BR-01140070 Sao Paulo, SP, Brazil
dc.description.affiliationUniv Cruzeiro Sul, Rua Galvao Bueno 868, BR-01506000 Sao Paulo, SP, Brazil
dc.description.affiliationArgonne Natl Lab, Div Phys, Argonne, IL 60439 USA
dc.description.affiliationForschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany
dc.description.affiliationJARA, D-52425 Julich, Germany
dc.description.affiliationUniv Autonoma Barcelona, IFAE, E-08193 Bellaterra, Barcelona, Spain
dc.description.affiliationUniv Autonoma Barcelona, BIST, E-08193 Bellaterra, Barcelona, Spain
dc.description.affiliationUniv Sci & Technol China, Inst Theoret Phys, Hefei 230026, Anhui, Peoples R China
dc.description.affiliationUniv Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz 271, BR-01140070 Sao Paulo, SP, Brazil
dc.description.sponsorshipRWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipU.S. Department of Energy, Office of Science, Office of Nuclear Physics
dc.description.sponsorshipChinese Ministry of Education
dc.description.sponsorshipEuropean Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie
dc.description.sponsorshipSpanish MINECO's Juan de la Cierva-Incorporacion program
dc.description.sponsorshipSpanish Ministerio de Economia, Industria y Competitividad
dc.description.sponsorshipForschungszentrum Julich GmbH
dc.description.sponsorshipNational Natural Science Foundation of China
dc.description.sponsorshipIdFAPESP: 2015/21550-4
dc.description.sponsorshipIdU.S. Department of Energy, Office of Science, Office of Nuclear Physics: DE-AC02-06CH11357
dc.description.sponsorshipIdEuropean Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie: 665919
dc.description.sponsorshipIdSpanish MINECO's Juan de la Cierva-Incorporacion program: IJCI-2016-30028
dc.description.sponsorshipIdSpanish Ministerio de Economia, Industria y Competitividad: FPA2014-55613-P
dc.description.sponsorshipIdSpanish Ministerio de Economia, Industria y Competitividad: SEV-2016-0588
dc.description.sponsorshipIdNational Natural Science Foundation of China: 11275180
dc.format.extent13
dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.97.034016
dc.identifier.citationPhysical Review D. College Pk: Amer Physical Soc, v. 97, n. 3, 13 p., 2018.
dc.identifier.doi10.1103/PhysRevD.97.034016
dc.identifier.issn2470-0010
dc.identifier.urihttp://hdl.handle.net/11449/184819
dc.identifier.wosWOS:000425093700003
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review D
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.titleStructure of the nucleon's low-lying excitationsen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmer Physical Soc
unesp.author.orcid0000-0001-7050-0148[2]
unesp.author.orcid0000-0001-5838-7103[5]

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