Two-loop additive mass renormalization with clover fermions and Symanzik improved gluons
| dc.creator | Skouroupathis, A. | |
| dc.creator | Constantinou, M. | |
| dc.creator | Panagopoulos, H. | |
| dc.date | 2008-01-21 | |
| dc.date.accessioned | 2026-07-07T11:55:24Z | |
| dc.date.available | 2026-07-07T11:55:24Z | |
| dc.description | We calculate the critical value of the hopping parameter, $κ_c$, in Lattice QCD, up to two loops in perturbation theory. We employ the Sheikholeslami-Wohlert (clover) improved action for fermions and the Symanzik improved gluon action with 4- and 6-link loops. The quantity which we study is a typical case of a vacuum expectation value resulting in an additive renormalization; as such, it is characterized by a power (linear) divergence in the lattice spacing, and its calculation lies at the limits of applicability of perturbation theory. Our results are polynomial in $c_{SW}$ (clover parameter) and cover a wide range of values for the Symanzik coefficients $c_i$. The dependence on the number of colors N and the number of fermion flavors $N_f$ is shown explicitly. In order to compare our results to non perturbative evaluations of $κ_c$ coming from Monte Carlo simulations, we employ an improved perturbation theory method for improved actions. | |
| dc.description | 20 pages, 8 figures, 14 tables. Phys. Rev. D77, Number 1 (2008) | |
| dc.identifier | https://arxiv.org/abs/0801.3146 | |
| dc.identifier | http://arxiv.org/abs/0801.3146 | |
| dc.identifier | Phys.Rev.D77:014513,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.77.014513 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/205228 | |
| dc.subject | High Energy Physics - Lattice | |
| dc.title | Two-loop additive mass renormalization with clover fermions and Symanzik improved gluons | |
| dc.type | text |