9 papers · 1 filter
Perturbative determination of improvement on the QCD running coupling
Marios Costa, Demetrianos Gavriel, Haralambos Panagopoulos +1
We present the perturbative results of the discretization errors proportional to the quark mass () on the QCD running coupling within lattice perturbation theory.…
Classification of four-quark operators with under flavor symmetry and their renormalization in a gauge-invariant scheme
Gregoris Spanoudes, Marios Costa, Kyproulla Mitsidi +1
In this paper we study a complete set of scalar and pseudoscalar four-quark operators, with a particular emphasis on their renormalization within a Gauge-Invariant Renormalization…
Collins-Soper Kernel and Reduced Soft Function in Lattice QCD
Constantia Alexandrou, Simone Bacchio, Krzysztof Cichy +5
We evaluate the Collins-Soper kernel and the reduced soft function in lattice QCD, incorporating matching corrections. The calculation relies on the evaluation…
Quark and gluon momentum fractions in the pion and in the kaon
Constantia Alexandrou, Simone Bacchio, Martha Constantinou +9
We present results on the momentum fraction carried by quarks and gluons in the pion and the kaon. We employ three gauge ensembles generated with Wilson twisted-mass cl…
Proton and neutron electromagnetic form factors using =2+1+1 twisted-mass fermions with physical values of the quark masses
Constantia Alexandrou, Simone Bacchio, Giannis Koutsou +2
We compute the electromagnetic form factors of the proton and neutron using lattice QCD with twisted mass clover-improved fermions and quark masses tuned to their…
Isovector axial and pseudoscalar form factors from twisted mass lattice QCD at the physical point
Constantia Alexandrou, Simone Bacchio, Martha Constantinou +6
We present the isovector axial, induced pseudoscalar, and pseudoscalar form factors of the nucleon using three twisted-mass fermion ensembles with degenerate up- and down-, strange…