Structure of the nucleon's low-lying excitations
dc.contributor.author | Chen, Chen [UNESP] | |
dc.contributor.author | El-Bennich, Bruno | |
dc.contributor.author | Roberts, Craig D. | |
dc.contributor.author | Schmidt, Sebastian M. | |
dc.contributor.author | Segovia, Jorge | |
dc.contributor.author | Wan, Shaolong | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.contributor.institution | Univ Cruzeiro Sul | |
dc.contributor.institution | Argonne Natl Lab | |
dc.contributor.institution | Forschungszentrum Julich | |
dc.contributor.institution | JARA | |
dc.contributor.institution | Univ Autonoma Barcelona | |
dc.contributor.institution | Univ Sci & Technol China | |
dc.date.accessioned | 2019-10-04T12:30:16Z | |
dc.date.available | 2019-10-04T12:30:16Z | |
dc.date.issued | 2018-02-15 | |
dc.description.abstract | A 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.affiliation | Univ Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz 271, BR-01140070 Sao Paulo, SP, Brazil | |
dc.description.affiliation | Univ Cruzeiro Sul, Rua Galvao Bueno 868, BR-01506000 Sao Paulo, SP, Brazil | |
dc.description.affiliation | Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA | |
dc.description.affiliation | Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany | |
dc.description.affiliation | JARA, D-52425 Julich, Germany | |
dc.description.affiliation | Univ Autonoma Barcelona, IFAE, E-08193 Bellaterra, Barcelona, Spain | |
dc.description.affiliation | Univ Autonoma Barcelona, BIST, E-08193 Bellaterra, Barcelona, Spain | |
dc.description.affiliation | Univ Sci & Technol China, Inst Theoret Phys, Hefei 230026, Anhui, Peoples R China | |
dc.description.affiliation | Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China | |
dc.description.affiliationUnesp | Univ Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz 271, BR-01140070 Sao Paulo, SP, Brazil | |
dc.description.sponsorship | RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany | |
dc.description.sponsorship | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | |
dc.description.sponsorship | U.S. Department of Energy, Office of Science, Office of Nuclear Physics | |
dc.description.sponsorship | Chinese Ministry of Education | |
dc.description.sponsorship | European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie | |
dc.description.sponsorship | Spanish MINECO's Juan de la Cierva-Incorporacion program | |
dc.description.sponsorship | Spanish Ministerio de Economia, Industria y Competitividad | |
dc.description.sponsorship | Forschungszentrum Julich GmbH | |
dc.description.sponsorship | National Natural Science Foundation of China | |
dc.description.sponsorshipId | FAPESP: 2015/21550-4 | |
dc.description.sponsorshipId | U.S. Department of Energy, Office of Science, Office of Nuclear Physics: DE-AC02-06CH11357 | |
dc.description.sponsorshipId | European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie: 665919 | |
dc.description.sponsorshipId | Spanish MINECO's Juan de la Cierva-Incorporacion program: IJCI-2016-30028 | |
dc.description.sponsorshipId | Spanish Ministerio de Economia, Industria y Competitividad: FPA2014-55613-P | |
dc.description.sponsorshipId | Spanish Ministerio de Economia, Industria y Competitividad: SEV-2016-0588 | |
dc.description.sponsorshipId | National Natural Science Foundation of China: 11275180 | |
dc.format.extent | 13 | |
dc.identifier | http://dx.doi.org/10.1103/PhysRevD.97.034016 | |
dc.identifier.citation | Physical Review D. College Pk: Amer Physical Soc, v. 97, n. 3, 13 p., 2018. | |
dc.identifier.doi | 10.1103/PhysRevD.97.034016 | |
dc.identifier.issn | 2470-0010 | |
dc.identifier.uri | http://hdl.handle.net/11449/184819 | |
dc.identifier.wos | WOS:000425093700003 | |
dc.language.iso | eng | |
dc.publisher | Amer Physical Soc | |
dc.relation.ispartof | Physical Review D | |
dc.rights.accessRights | Acesso aberto | |
dc.source | Web of Science | |
dc.title | Structure of the nucleon's low-lying excitations | en |
dc.type | Artigo | |
dcterms.license | http://publish.aps.org/authors/transfer-of-copyright-agreement | |
dcterms.rightsHolder | Amer Physical Soc | |
unesp.author.orcid | 0000-0001-7050-0148[2] | |
unesp.author.orcid | 0000-0001-5838-7103[5] |