Disconnected quark loop contributions to nucleon observables in lattice QCD
Date
2014Author
Abdel-Rehim, A.Alexandrou, Constantia
Constantinou, Martha
Drach, V.
Hadjiyiannakou, Kyriakos
Jansen, K.
Koutsou, Giannis
Vaquero, A.
ISSN
1550-7998Source
Physical Review D - Particles, Fields, Gravitation and CosmologyVolume
89Issue
3Google Scholar check
Metadata
Show full item recordAbstract
We perform a high statistics calculation of disconnected fermion loops on graphics processing units for a range of nucleon matrix elements extracted using lattice QCD. The isoscalar electromagnetic and axial vector form factors, the sigma terms and the momentum fraction and helicity are among the quantities we evaluate. We compare the disconnected contributions to the connected ones and give the physical implications on nucleon observables that probe its structure. © 2014 American Physical Society.