Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV

Detalhes bibliográficos
Autor(a) principal: Gross, Franz
Data de Publicação: 2008
Outros Autores: Stadler, Alfred
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/6022
Resumo: Using the covariant spectator theory (CST), we present two one-boson-exchange kernels that have been successfully adjusted to fit the 2007 world np data (containing 3788 data) below 350 MeV. One model (which we designate WJC-1) has 27 parameters and fits with a χ2/Ndata = 1.06. The other model (designated WJC-2) has only 15 parameters and fits with a χ2/Ndata = 1.12. Both of these models also reproduce the experimental triton binding energy without introducing additional irreducible three-nucleon forces. One result of this work is a new phase-shift analysis, updated for all data until 2006, which is useful even if one does not work within the CST. In carrying out these fits we have reviewed the entire database, adding new data not previously used in other high precision fits and restoring some data omitted in previous fits. A full discussion and evaluation of the 2007 database is presented.
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spelling Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeVNeutron-proton scatteringPhase-shiftsCovariant Spectator TheoryNucleon-Nucleon InteractionUsing the covariant spectator theory (CST), we present two one-boson-exchange kernels that have been successfully adjusted to fit the 2007 world np data (containing 3788 data) below 350 MeV. One model (which we designate WJC-1) has 27 parameters and fits with a χ2/Ndata = 1.06. The other model (designated WJC-2) has only 15 parameters and fits with a χ2/Ndata = 1.12. Both of these models also reproduce the experimental triton binding energy without introducing additional irreducible three-nucleon forces. One result of this work is a new phase-shift analysis, updated for all data until 2006, which is useful even if one does not work within the CST. In carrying out these fits we have reviewed the entire database, adding new data not previously used in other high precision fits and restoring some data omitted in previous fits. A full discussion and evaluation of the 2007 database is presented.The American Physical Society2012-11-27T15:41:28Z2012-11-272008-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/6022http://hdl.handle.net/10174/6022engPhys. Rev. C 78, 014005 (2008)http://link.aps.org/doi/10.1103/PhysRevC.78.014005gross@jlab.orgstadler@cii.fc.ul.pt347Gross, FranzStadler, Alfredinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:45:27Zoai:dspace.uevora.pt:10174/6022Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:01:00.959139Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
title Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
spellingShingle Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
Gross, Franz
Neutron-proton scattering
Phase-shifts
Covariant Spectator Theory
Nucleon-Nucleon Interaction
title_short Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
title_full Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
title_fullStr Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
title_full_unstemmed Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
title_sort Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
author Gross, Franz
author_facet Gross, Franz
Stadler, Alfred
author_role author
author2 Stadler, Alfred
author2_role author
dc.contributor.author.fl_str_mv Gross, Franz
Stadler, Alfred
dc.subject.por.fl_str_mv Neutron-proton scattering
Phase-shifts
Covariant Spectator Theory
Nucleon-Nucleon Interaction
topic Neutron-proton scattering
Phase-shifts
Covariant Spectator Theory
Nucleon-Nucleon Interaction
description Using the covariant spectator theory (CST), we present two one-boson-exchange kernels that have been successfully adjusted to fit the 2007 world np data (containing 3788 data) below 350 MeV. One model (which we designate WJC-1) has 27 parameters and fits with a χ2/Ndata = 1.06. The other model (designated WJC-2) has only 15 parameters and fits with a χ2/Ndata = 1.12. Both of these models also reproduce the experimental triton binding energy without introducing additional irreducible three-nucleon forces. One result of this work is a new phase-shift analysis, updated for all data until 2006, which is useful even if one does not work within the CST. In carrying out these fits we have reviewed the entire database, adding new data not previously used in other high precision fits and restoring some data omitted in previous fits. A full discussion and evaluation of the 2007 database is presented.
publishDate 2008
dc.date.none.fl_str_mv 2008-01-01T00:00:00Z
2012-11-27T15:41:28Z
2012-11-27
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/6022
http://hdl.handle.net/10174/6022
url http://hdl.handle.net/10174/6022
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Phys. Rev. C 78, 014005 (2008)
http://link.aps.org/doi/10.1103/PhysRevC.78.014005
gross@jlab.org
stadler@cii.fc.ul.pt
347
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv The American Physical Society
publisher.none.fl_str_mv The American Physical Society
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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