Meson-exchange-currents contribution to axial charge transitions

We study the contribution of meson-exchange currents (MEC) to axial charge transitions in the framework of quantum hadrodynamics II. We extend a previous work which considered the contributions of one-body processes and vacuum polarization corrections. Calculations in mean-field theory (the Walecka...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Barenboim, Gabriela Alejandra, Gattone, Aníbal Osvaldo, Izquierdo, Eduardo Daniel
Publicado: 1993
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v48_n5_p2537_Barenboim
http://hdl.handle.net/20.500.12110/paper_05562813_v48_n5_p2537_Barenboim
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_05562813_v48_n5_p2537_Barenboim
record_format dspace
spelling paper:paper_05562813_v48_n5_p2537_Barenboim2023-06-08T15:41:38Z Meson-exchange-currents contribution to axial charge transitions Barenboim, Gabriela Alejandra Gattone, Aníbal Osvaldo Izquierdo, Eduardo Daniel We study the contribution of meson-exchange currents (MEC) to axial charge transitions in the framework of quantum hadrodynamics II. We extend a previous work which considered the contributions of one-body processes and vacuum polarization corrections. Calculations in mean-field theory (the Walecka model) and in the relativistic Hartree approximation are presented. In each of these cases we show results using pseudovector and pseudoscalar πN coupling. We find that the MEC contribution to the process is always sizable (much more so when using pseudoscalar coupling), transition dependent, and very sensitive to the coupling at the ρπ vertex. © 1993 The American Physical Society. Fil:Barenboim, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gattone, A.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Izquierdo, E.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1993 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v48_n5_p2537_Barenboim http://hdl.handle.net/20.500.12110/paper_05562813_v48_n5_p2537_Barenboim
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We study the contribution of meson-exchange currents (MEC) to axial charge transitions in the framework of quantum hadrodynamics II. We extend a previous work which considered the contributions of one-body processes and vacuum polarization corrections. Calculations in mean-field theory (the Walecka model) and in the relativistic Hartree approximation are presented. In each of these cases we show results using pseudovector and pseudoscalar πN coupling. We find that the MEC contribution to the process is always sizable (much more so when using pseudoscalar coupling), transition dependent, and very sensitive to the coupling at the ρπ vertex. © 1993 The American Physical Society.
author Barenboim, Gabriela Alejandra
Gattone, Aníbal Osvaldo
Izquierdo, Eduardo Daniel
spellingShingle Barenboim, Gabriela Alejandra
Gattone, Aníbal Osvaldo
Izquierdo, Eduardo Daniel
Meson-exchange-currents contribution to axial charge transitions
author_facet Barenboim, Gabriela Alejandra
Gattone, Aníbal Osvaldo
Izquierdo, Eduardo Daniel
author_sort Barenboim, Gabriela Alejandra
title Meson-exchange-currents contribution to axial charge transitions
title_short Meson-exchange-currents contribution to axial charge transitions
title_full Meson-exchange-currents contribution to axial charge transitions
title_fullStr Meson-exchange-currents contribution to axial charge transitions
title_full_unstemmed Meson-exchange-currents contribution to axial charge transitions
title_sort meson-exchange-currents contribution to axial charge transitions
publishDate 1993
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v48_n5_p2537_Barenboim
http://hdl.handle.net/20.500.12110/paper_05562813_v48_n5_p2537_Barenboim
work_keys_str_mv AT barenboimgabrielaalejandra mesonexchangecurrentscontributiontoaxialchargetransitions
AT gattoneanibalosvaldo mesonexchangecurrentscontributiontoaxialchargetransitions
AT izquierdoeduardodaniel mesonexchangecurrentscontributiontoaxialchargetransitions
_version_ 1768544322668462080

Ejemplares similares