Position space method for the nucleon magnetic moment in lattice QCD
Genre
Journal ArticleDate
2016-10-26Author
Alexandrou, CConstantinou, M
Koutsou, G
Ottnad, K
Petschlies, M
Permanent link to this record
http://hdl.handle.net/20.500.12613/5697
Metadata
Show full item recordDOI
10.1103/PhysRevD.94.074508Abstract
© 2016 American Physical Society. The extraction of the magnetic form factor of the nucleon at zero momentum transfer is usually performed by adopting a parametrization for its momentum dependence and fitting the results obtained at finite momenta. We present a position space method that allows us to remove the momentum prefactor in the form factor decomposition and hence compute the magnetic form factor directly at zero momentum without the need to assume a functional form for its momentum dependence. The method is explored on one ensemble using Nf=2+1+1 Wilson twisted mass fermions with a light quark mass corresponding to Mπ=373 MeV and a lattice spacing of a≈0.082 fm. We obtain results for the isovector magnetic moment and for the proton and neutron magnetic moments. The value we find for the isovector magnetic moment is larger as compared to fitting the form factor at the discrete values of the lattice momentum transfers using a dipole Ansatz, bringing it closer to the experimental value.Citation to related work
American Physical Society (APS)Has part
Physical Review DADA compliance
For Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.eduae974a485f413a2113503eed53cd6c53
http://dx.doi.org/10.34944/dspace/5679