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of 508
pro vyhledávání: '"Panagopoulos, H."'
Supersymmetric QCD on the lattice: Fine-tuning and counterterms for the Yukawa and quartic couplings
In this study, we determine the fine-tuning of parameters in $\mathcal{N} = 1$ Supersymmetric QCD, discretized on a Euclidean lattice. Our focus is on the renormalization of Yukawa (gluino-quark-squark interactions) and quartic (four-squark interacti
Externí odkaz:
http://arxiv.org/abs/2410.04086
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 advantageous compared to other schemes, especially in nonperturbative latti
Externí odkaz:
http://arxiv.org/abs/2406.08065
Autor:
Spanoudes, G., Alexandrou, C., Finkenrath, J., Hadjiyiannakou, K., Panagopoulos, H., Yamamoto, S.
We present preliminary results for the renormalization functions (RFs) of a number of quark and gluon operators studied in lattice QCD using a gauge-invariant renormalization scheme (GIRS). GIRS is a variant of the coordinate-space renormalization pr
Externí odkaz:
http://arxiv.org/abs/2212.07730
In this work, we investigate the fine tuning of parameters in $\mathcal{N} = 1$ Supersymmetric QCD, discretized on a Euclidean lattice. Specifically, we study the renormalization of the Yukawa (gluino-quark-squark interactions) and the quartic (four-
Externí odkaz:
http://arxiv.org/abs/2210.03695
Autor:
Spanoudes, G., Costa, M., Karpasitis, I., Pafitis, T., Panagopoulos, G., Panagopoulos, H., Skouroupathis, A.
We study a gauge-invariant renormalization scheme (GIRS) for composite operators, regularized on the lattice, by extending the coordinate space (X-space) scheme proposed some years ago. In this scheme, Green's functions of products of gauge-invariant
Externí odkaz:
http://arxiv.org/abs/2111.03843
Autor:
Costa, M., Karpasitis, I., Panagopoulos, G., Panagopoulos, H., Pafitis, T., Skouroupathis, A., Spanoudes, G.
Publikováno v:
Phys. Rev. D 103, 094509 (2021)
We consider a gauge-invariant, mass-independent prescription for renormalizing composite operators, regularized on the lattice, in the spirit of the coordinate space (X-space) renormalization scheme. The prescription involves only Green's functions o
Externí odkaz:
http://arxiv.org/abs/2102.00858
Autor:
Alexandrou, C., Bacchio, S., Constantinou, M., Finkenrath, J., Hadjiyiannakou, K., Jansen, K., Koutsou, G., Panagopoulos, H., Spanoudes, G.
We evaluate the gluon and quark contributions to the spin of the proton using an ensemble of gauge configuration generated at physical pion mass. We compute all valence and sea quark contributions to high accuracy. We perform a non-perturbative renor
Externí odkaz:
http://arxiv.org/abs/2003.08486
Autor:
Costa, M., Panagopoulos, H.
Publikováno v:
Phys. Rev. D 99, 074512 (2019)
We study $4$-dimensional SQCD with gauge group $SU(N_c)$ and $N_f$ flavors of chiral super-multiplets on the lattice. We perform extensive calculations of matrix elements and renormalization factors of composite operators in Perturbation Theory. In p
Externí odkaz:
http://arxiv.org/abs/1812.06770
Akademický článek
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Autor:
Spanoudes, G., Panagopoulos, H.
Publikováno v:
Phys. Rev. D 98, 014509 (2018)
In this paper, we examine the effect of nonzero quark masses on the renormalization of gauge-invariant nonlocal quark bilinear operators, including a finite-length Wilson line (called Wilson-line operators). These operators are relevant to the defini
Externí odkaz:
http://arxiv.org/abs/1805.01164