We present results on the nucleon electromagnetic form factors within lattice QCD using two flavors of degenerate twisted mass fermions. Volume effects are examined using simulations at two volumes of spatial length L = 2.1 fm and L = 2.8 fm. Cutoff effects are investigated using three different values of the lattice spacings, namely a = 0.089 fm, a = 0.070 fm and a = 0.056 fm. The nucleon magnetic moment, Dirac and Pauli radii are obtained in the continuum limit and chirally extrapolated to the physical pion mass allowing for a comparison with experiment.
Nucleon electromagnetic form factors in twisted mass lattice QCD / C., Alexandrou; M., Brinet; J., Carbonell; M., Constantinou; P. a., Harraud; P., Guichon; K., Jansen; T., Korzec; Papinutto, MAURO LUCIO. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 83:9(2011), p. 094502. [10.1103/physrevd.83.094502]
Nucleon electromagnetic form factors in twisted mass lattice QCD
PAPINUTTO, MAURO LUCIO
2011
Abstract
We present results on the nucleon electromagnetic form factors within lattice QCD using two flavors of degenerate twisted mass fermions. Volume effects are examined using simulations at two volumes of spatial length L = 2.1 fm and L = 2.8 fm. Cutoff effects are investigated using three different values of the lattice spacings, namely a = 0.089 fm, a = 0.070 fm and a = 0.056 fm. The nucleon magnetic moment, Dirac and Pauli radii are obtained in the continuum limit and chirally extrapolated to the physical pion mass allowing for a comparison with experiment.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
