Matching the quark model to the 1/Nc expansion

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We compute the coefficients of the effective mass operator of the 1/N c expansion for negative parity L=1 excited baryons using the Isgur-Karl model in order to compare the general approach, where the coefficients are obtained by fitting to data, with a specific constituent quark model calculation....

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Detalles Bibliográficos
Autores principales: Pirjol, D., Schat, C.
Formato: CONF
Materias:
1/N expansion of QCD
excited baryons
Quark model
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0094243X_v1374_n_p425_Pirjol
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0094243X_v1374_n_p425_Pirjol
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spelling todo:paper_0094243X_v1374_n_p425_Pirjol2023-10-03T14:56:03Z Matching the quark model to the 1/Nc expansion Pirjol, D. Schat, C. 1/N expansion of QCD excited baryons Quark model We compute the coefficients of the effective mass operator of the 1/N c expansion for negative parity L=1 excited baryons using the Isgur-Karl model in order to compare the general approach, where the coefficients are obtained by fitting to data, with a specific constituent quark model calculation. We discuss the physics behind the fitted coefficients for the scalar part of the most general two-body quark-quark interaction. We find that both pion exchange and gluon exchange lead to the dominance of the same operator at the level of the effective mass operator, which is also observed from data. © 2011 American Institute of Physics. CONF info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0094243X_v1374_n_p425_Pirjol
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 1/N expansion of QCD
excited baryons
Quark model
spellingShingle 1/N expansion of QCD
excited baryons
Quark model
Pirjol, D.
Schat, C.
Matching the quark model to the 1/Nc expansion
topic_facet 1/N expansion of QCD
excited baryons
Quark model
description We compute the coefficients of the effective mass operator of the 1/N c expansion for negative parity L=1 excited baryons using the Isgur-Karl model in order to compare the general approach, where the coefficients are obtained by fitting to data, with a specific constituent quark model calculation. We discuss the physics behind the fitted coefficients for the scalar part of the most general two-body quark-quark interaction. We find that both pion exchange and gluon exchange lead to the dominance of the same operator at the level of the effective mass operator, which is also observed from data. © 2011 American Institute of Physics.
format CONF
author Pirjol, D.
Schat, C.
author_facet Pirjol, D.
Schat, C.
author_sort Pirjol, D.
title Matching the quark model to the 1/Nc expansion
title_short Matching the quark model to the 1/Nc expansion
title_full Matching the quark model to the 1/Nc expansion
title_fullStr Matching the quark model to the 1/Nc expansion
title_full_unstemmed Matching the quark model to the 1/Nc expansion
title_sort matching the quark model to the 1/nc expansion
url http://hdl.handle.net/20.500.12110/paper_0094243X_v1374_n_p425_Pirjol
work_keys_str_mv AT pirjold matchingthequarkmodeltothe1ncexpansion
AT schatc matchingthequarkmodeltothe1ncexpansion
_version_ 1807320902889635840

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