Structure of the nucleon's low-lying excitations

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Cruzeiro Do sul-
Autor(es): dc.contributorArgonne National Laboratory-
Autor(es): dc.contributorJARA-
Autor(es): dc.contributorUniversitat Autònoma de Barcelona-
Autor(es): dc.contributorUniversity of Science and Technology of China-
Autor(es): dc.creatorChen, Chen-
Autor(es): dc.creatorEl-Bennich, Bruno-
Autor(es): dc.creatorRoberts, Craig D.-
Autor(es): dc.creatorSchmidt, Sebastian M.-
Autor(es): dc.creatorSegovia, Jorge-
Autor(es): dc.creatorWan, Shaolong-
Data de aceite: dc.date.accessioned2025-08-21T21:11:14Z-
Data de disponibilização: dc.date.available2025-08-21T21:11:14Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2018-02-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.97.034016-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/228519-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/228519-
Descrição: dc.descriptionA 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,JP=1/2±) 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±) doublets will prove valuable in testing links between emergent mass generation and observable phenomena and, plausibly, thereby revealing dynamical features of confinement.-
Descrição: dc.descriptionU.S. Department of Energy-
Descrição: dc.descriptionNational Natural Science Foundation of China-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionOffice of Science-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271-
Descrição: dc.descriptionUniversidade Cruzeiro Do sul, Rua Galvão Bueno, 868-
Descrição: dc.descriptionPhysics Division Argonne National Laboratory-
Descrição: dc.descriptionInstitute for Advanced Simulation Forschungszentrum Jülich JARA-
Descrição: dc.descriptionInstitut de Física d'Altes Energies (IFAE) Barcelona Institute of Science and Technology (BIST) Universitat Autònoma de Barcelona-
Descrição: dc.descriptionInstitute for Theoretical Physics Department of Modern Physics University of Science and Technology of China-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271-
Descrição: dc.descriptionNational Natural Science Foundation of China: 11275180-
Descrição: dc.descriptionFAPESP: 2015/21550-4-
Idioma: dc.languageen-
Relação: dc.relationPhysical Review D-
???dc.source???: dc.sourceScopus-
Título: dc.titleStructure of the nucleon's low-lying excitations-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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