Loading...
Strange nucleon electromagnetic form factors from lattice QCD
Alexandrou, C Constantinou, M Hadjiyiannakou, K Jansen, K Kallidonis, C Koutsou, G Avilés-Casco, AV
Alexandrou, C
Constantinou, M
Hadjiyiannakou, K
Jansen, K
Kallidonis, C
Koutsou, G
Avilés-Casco, AV
Citations
Altmetric:
Genre
Journal Article
Date
2018-05-01
Advisor
Committee member
Group
Department
Permanent link to this record
Collections
Research Projects
Organizational Units
Journal Issue
DOI
10.1103/PhysRevD.97.094504
Abstract
© 2018 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. We evaluate the strange nucleon electromagnetic form factors using an ensemble of gauge configurations generated with two degenerate maximally twisted mass clover-improved fermions with mass tuned to approximately reproduce the physical pion mass. In addition, we present results for the disconnected light quark contributions to the nucleon electromagnetic form factors. Improved stochastic methods are employed leading to high-precision results. The momentum dependence of the disconnected contributions is fitted using the model-independent z-expansion. We extract the magnetic moment and the electric and magnetic radii of the proton and neutron by including both connected and disconnected contributions. We find that the disconnected light quark contributions to both electric and magnetic form factors are nonzero and at the few percent level as compared to the connected. The strange form factors are also at the percent level but more noisy yielding statistical errors that are typically within one standard deviation from a zero value.
Description
Citation
Citation to related work
American Physical Society (APS)
Has part
Physical Review D
ADA compliance
For Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu