5 papers · 1 filter
Nucleon charges and -terms in lattice QCD
C. Alexandrou, S. Bacchio, J. Finkenrath +4
We determine the nucleon axial, scalar and tensor charges and the nucleon -terms using twisted mass fermions. We employ three ensembles with approximately equal physical volume…
Gauge-invariant renormalization of four-quark operators
M. Constantinou, M. Costa, H. Herodotou +2
We study the renormalization of four-quark operators in one-loop perturbation theory. We employ a coordinate-space Gauge-Invariant Renormalization Scheme (GIRS), which can be advan…
Renormalization of nonlocal gluon operators on the lattice
Demetrianos Gavriel, Haralambos Panagopoulos, Gregoris Spanoudes
We study the renormalization of a complete set of gauge-invariant gluon nonlocal operators in lattice perturbation theory. We determine the mixing pattern under renormalization of…
Renormalization of asymmetric staple-shaped Wilson-line operators in lattice and continuum perturbation theory
Gregoris Spanoudes, Martha Constantinou, Haralambos Panagopoulos
In this work, we study the renormalization of nonlocal quark bilinear operators containing an asymmetric staple-shaped Wilson line at the one-loop level in both lattice and continu…
Quark and gluon momentum fractions in the pion and in the kaon
Constantia Alexandrou, Simone Bacchio, Martha Constantinou +9
We present the full decomposition of the momentum fraction carried by quarks and gluons in the pion and the kaon. We employ three gauge ensembles generated with Wilson…