repositories = "RIO: Repositorio Institucional Olavide"

Encontrado 1,659 documentos, página mostrada 1 de 166

Ghost-gluon coupling, power corrections, and ^MS¯¯¯¯¯ from lattice QCD with a dynamical charm

Description: This paper is a first report on the determination of ^MS¯¯¯¯¯¯ from lattice simulations with 2+1+1 twisted-mass dynamical flavors via the computation of the ghost-gluon coupling renormalized in the MOM Taylor scheme. We show this approach allows a very good control of the lattice artefacts and confi...
Language(s): Inglés

Ghost-gluon coupling, power corrections, and ^MS¯¯¯¯¯ from twisted-mass lattice QCD at Nf=2

Description: We present results concerning the nonperturbative evaluation of the ghost-gluon running QCD coupling constant from Nf=2 twisted-mass lattice calculations. A novel method for calibrating the lattice spacing, independent of the string tension and hadron spectrum, is presented with results in agreement...
Language(s): Inglés

The Transtranslator. An attempt to outline a technology-based traductology

Description: Poster presented at the 'EST Symposium: Same place, different times', held September 27-28, 2012, University of Vienna, Austria. , Universität Wien , Preprint
Language(s): Inglés

Modified instanton profile effects from lattice Green functions

Description: We trace here instantons through the analysis of pure Yang-Mills gluon Green functions in the Landau gauge for a window of IR momenta (0.4
Language(s): Inglés

Transparent expression of the A2 condensate's renormalization

Description: We give a more transparent understanding of the vacuum expectation value of the renormalized local operator A2 by relating it to the gluon propagator integrated over the momentum. The quadratically divergent perturbative contribution is subtracted and the remainder, dominantly due to the O(1/p2) cor...
Language(s): Inglés

Instantons and the A2 condensate

Description: We argue that the A2OPE condensate found in the Landau gauge on lattices, when an operator product expansion of Green's functions is performed, might be explained by instantons. We use cooling to estimate the instanton contribution and extrapolate back the result to the thermalized configuration. Th...
Language(s): Inglés

Remarks on the determination of the Landau gauge OPE for the asymmetric three gluon vertex

Description: We compute a compact operator product expansion (OPE) formula describing power corrections to the perturbative expression for the asymmetric momentum subtraction¿(MOM¿¿) renormalized running coupling constant up to the leading logarithm. By the use of a phenomenological hypothesis leading to the fac...
Language(s): Inglés

Three-gluon running coupling from lattice QCD at N f = 2 + 1 + 1: A consistency check of the OPE approach

Description: We present a lattice calculation of the renormalized running coupling constant in symmetric (MOM) and asymmetric (MOM¿) momentum substraction schemes including u, d, s and c quarks in the sea. An Operator Product Expansion dominated by the dimension-two ¿A 2¿ condensate is used to fit the running of...
Language(s): Inglés

On the reduction of hypercubic lattice artifacts

Description: This note presents a comparative study of various options to reduce the errors coming from the discretization of a Quantum Field Theory in a lattice with hypercubic symmetry. We show that it is possible to perform an extrapolation towards the continuum which is able to eliminate systematically the a...
Language(s): Inglés

On the instanton traces from lattice gluon large-distance correlation

Description: We show that lattice two- and three-gluon Green functions can be satisfactorily described in terms of semi-classical Yang-Mills solutions after applying some cooling procedure to kill short distance correlations. The same semi-classical behaviour is observed also in the low-momentum regime for the M...
Language(s): Inglés

Encontrado 1,659 documentos, página mostrada 1 de 166

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