Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Spanoudes, Gregoris"'
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 these operators using symmetry arguments, which extend beyond perturba
Externí odkaz:
http://arxiv.org/abs/2406.15446
Autor:
Alexandrou, Constantia, Bacchio, Simone, Constantinou, Martha, Delmar, Joseph, Finkenrath, Jacob, Kostrzewa, Bartosz, Petschlies, Marcus, Chacon, Luis Alberto Rodriguez, Spanoudes, Gregoris, Steffens, Fernanda, Urbach, Carsten, wenger, Urs
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 $N_f=2+1+1$ Wilson twisted-mass clover-improved fermions at the physical quark masses. Fo
Externí odkaz:
http://arxiv.org/abs/2405.08529
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 continuum perturbation theory. These operators enter the first-principle calc
Externí odkaz:
http://arxiv.org/abs/2401.01182
Autor:
Alexandrou, Constantia, Bacchio, Simone, Constantinou, Martha, Finkenrath, Jacob, Frezzotti, Roberto, Kostrzewa, Bartosz, Koutsou, Giannis, Spanoudes, Gregoris, Urbach, Carsten
We compute the nucleon axial and pseudoscalar form factors using three $N_f=$2+1+1 twisted mass fermion ensembles with all quark masses tuned to approximately their physical values. The values of the lattice spacings of these three physical point ens
Externí odkaz:
http://arxiv.org/abs/2309.05774
Autor:
Alexandrou, Constantia, Bacchio, Simone, Cichy, Krzysztof, Constantinou, Martha, Feng, Xu, Jansen, Karl, Liu, Chuan, Sen, Aniket, Spanoudes, Gregoris, Steffens, Fernanda, Tarello, Jacopo
Staple-shaped Wilson line operators are necessary for the study of transverse momentum-dependent parton distribution functions (TMDPDFs) in lattice QCD and beyond. In this work, we study the renormalization of such operators in the general case of an
Externí odkaz:
http://arxiv.org/abs/2305.11824
Autor:
Bergner, Georg, Costa, Marios, Panagopoulos, Haralambos, Piemonte, Stefano, Soler, Ivan, Spanoudes, Gregoris
Supersymmetry on the lattice is explicitly broken by the gluino mass and lattice artifacts. However, it can be restored in the continuum limit by fine tuning the parameters based on the renormalized Ward identities. On the renormalization step not on
Externí odkaz:
http://arxiv.org/abs/2212.10524
In this work we present perturbative results for the renormalization of the supercurrent operator, $S_\mu$, in ${\cal N} =1$ Supersymmetric Yang-Mills theory. At the quantum level, this operator mixes with both gauge invariant and noninvariant operat
Externí odkaz:
http://arxiv.org/abs/2210.06957
Autor:
Alexandrou, Constantia, Bacchio, Simone, Constantinou, Martha, Dimopoulos, Petros, Finkenrath, Jacob, Frezzotti, Roberto, Hadjiyiannakou, Kyriakos, Jansen, Karl, Kostrzewa, Bartosz, Koutsou, Giannis, Spanoudes, Gregoris, Urbach, Carsten
We present a calculation of the Mellin moments of the nucleon transverse quark spin densities extracted from the unpolarized and transversity generalized form factors. We use three $N_F=2+1+1$ ensembles of twisted mass fermions with quark masses tune
Externí odkaz:
http://arxiv.org/abs/2210.05743
Autor:
Bergner, Georg, Costa, Marios, Panagopoulos, Haralambos, Piemonte, Stefano, Soler, Ivan, Spanoudes, Gregoris
In this work, we study the nonperturbative renormalization of the supercurrent operator in $\mathcal{N} = 1$ Supersymmetric Yang-Mills (SYM) theory, using a gauge-invariant renormalization scheme (GIRS). The proposed prescription addresses successful
Externí odkaz:
http://arxiv.org/abs/2209.13934
In this work we perform a perturbative study of the Noether supercurrent operator in the context of Supersymmetric ${\cal N}{=}1$ Yang-Mills (SYM) theory on the lattice. The supercurrent mixes with several other operators, some of which are not gauge
Externí odkaz:
http://arxiv.org/abs/2205.02012