N to Delta electromagnetic transition form factors from lattice QCD

Mostrar otras versiones (2)

The magnetic dipole, the electric quadrupole and the Coulomb quadrupole amplitudes for the transition $\gamma N\to \Delta$ are evaluated both in quenched lattice QCD at $\beta=6.0$ and using two dynamical Wilson fermions simulated at $\beta=5.6$. The dipole transition form factor is accurately deter...

Descripción completa

Detalles Bibliográficos
Autores principales: Alexandrou, C., de Forcrand, Ph., Lippert, Th., Neff, H., Negele, John W., Schilling, K., Schroers, W., Tsapalis, A.
Lenguaje:eng
Publicado: 2004
Materias:
XX
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.69.114506
http://cds.cern.ch/record/974919
_version_ 1780910903413178368
author Alexandrou, C.
de Forcrand, Ph.
Lippert, Th.
Neff, H.
Negele, John W.
Schilling, K.
Schroers, W.
Tsapalis, A.
author_facet Alexandrou, C.
de Forcrand, Ph.
Lippert, Th.
Neff, H.
Negele, John W.
Schilling, K.
Schroers, W.
Tsapalis, A.
author_sort Alexandrou, C.
collection CERN
description The magnetic dipole, the electric quadrupole and the Coulomb quadrupole amplitudes for the transition $\gamma N\to \Delta$ are evaluated both in quenched lattice QCD at $\beta=6.0$ and using two dynamical Wilson fermions simulated at $\beta=5.6$. The dipole transition form factor is accurately determined at several values of momentum transfer. On the lattices studied in this work, the electric quadrupole amplitude is found to be non-zero yielding a negative value for the ratio, $ R_{EM}$, of electric quadrupole to magnetic dipole amplitudes at three values of momentum transfer.
id cern-974919
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2004
record_format invenio
spelling cern-9749192023-03-14T20:38:31Zdoi:10.1103/PhysRevD.69.114506http://cds.cern.ch/record/974919engAlexandrou, C.de Forcrand, Ph.Lippert, Th.Neff, H.Negele, John W.Schilling, K.Schroers, W.Tsapalis, A.N to Delta electromagnetic transition form factors from lattice QCDXXThe magnetic dipole, the electric quadrupole and the Coulomb quadrupole amplitudes for the transition $\gamma N\to \Delta$ are evaluated both in quenched lattice QCD at $\beta=6.0$ and using two dynamical Wilson fermions simulated at $\beta=5.6$. The dipole transition form factor is accurately determined at several values of momentum transfer. On the lattices studied in this work, the electric quadrupole amplitude is found to be non-zero yielding a negative value for the ratio, $ R_{EM}$, of electric quadrupole to magnetic dipole amplitudes at three values of momentum transfer.hep-lat/0307018oai:cds.cern.ch:9749192004
spellingShingle XX
Alexandrou, C.
de Forcrand, Ph.
Lippert, Th.
Neff, H.
Negele, John W.
Schilling, K.
Schroers, W.
Tsapalis, A.
N to Delta electromagnetic transition form factors from lattice QCD
title N to Delta electromagnetic transition form factors from lattice QCD
title_full N to Delta electromagnetic transition form factors from lattice QCD
title_fullStr N to Delta electromagnetic transition form factors from lattice QCD
title_full_unstemmed N to Delta electromagnetic transition form factors from lattice QCD
title_short N to Delta electromagnetic transition form factors from lattice QCD
title_sort n to delta electromagnetic transition form factors from lattice qcd
topic XX
url https://dx.doi.org/10.1103/PhysRevD.69.114506
http://cds.cern.ch/record/974919
work_keys_str_mv AT alexandrouc ntodeltaelectromagnetictransitionformfactorsfromlatticeqcd
AT deforcrandph ntodeltaelectromagnetictransitionformfactorsfromlatticeqcd
AT lippertth ntodeltaelectromagnetictransitionformfactorsfromlatticeqcd
AT neffh ntodeltaelectromagnetictransitionformfactorsfromlatticeqcd
AT negelejohnw ntodeltaelectromagnetictransitionformfactorsfromlatticeqcd
AT schillingk ntodeltaelectromagnetictransitionformfactorsfromlatticeqcd
AT schroersw ntodeltaelectromagnetictransitionformfactorsfromlatticeqcd
AT tsapalisa ntodeltaelectromagnetictransitionformfactorsfromlatticeqcd

Ejemplares similares