14.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of PisaIT5.2k papers
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16 papers · 2 filters
Topics in Non-Perturbative QCD
Adriano Di Giacomo
General aspects of non-perturbative field theory are discussed.The definition of condensates is analysed.Mechanisms of color confinement are rewieved.
Monopoles, vortices and confinement in SU(3) gauge theory
L. Del Debbio, A. Di Giacomo, B. Lucini
We compute, in SU(3) pure gauge theory, the vacuum expectation value (vev) of the operator which creates a vortex wrapping the lattice through periodic boundary conditions (d…
The interaction between center monopoles in SU(2) Yang-Mills
Ph. de Forcrand, M. D'Elia, M. Pepe
We study the potential between a static center monopole and antimonopole in 4d SU(2) Yang-Mills theory. Using a new numerical method, we show that the 't Hooft loop is a dual order…
Topology in full QCD with 2 colours at finite temperature and density
B. Alles, M. D'Elia, M. P. Lombardo +1
We present preliminary results about topology and several other quantities at non-zero baryon density and finite temperature in full QCD with N_c=2.
Vortices versus monopoles in color confinement
L Del Debbio, A Di Giacomo, B Lucini
We construct the creation operator of a vortex for SU(2) pure gauge theory using the methods developed for monopoles. We interpret its vacuum expectation value as a disorder parame…
Lattice QCD with the Overlap-Dirac Operator: Its Parameter, and One-Loop Renormalization of Fermionic Currents
C. Alexandrou, E. Follana, H. Panagopoulos +1
We compute the ratio between the scale associated with a lattice formulation of QCD using the overlap-Dirac operator, and . To this end, the one-loop relation bet…
Critical Behaviour in the Dense Planar NJL Model
Simon Hands, Biagio Lucini, Susan Morrison
We present results of a Monte Carlo simulation of a 2+1 dimensional Nambu - Jona-Lasinio model including diquark source terms. A diquark condensate <qq> is measured as a function o…
Operator Product Expansion on the Lattice: a Numerical Test in the Two-Dimensional Non-Linear Sigma-Model
Sergio Caracciolo, Andrea Montanari, Andrea Pelissetto
We consider the short-distance behaviour of the product of the Noether O(N) currents in the lattice nonlinear sigma-model. We compare the numerical results with the predictions of…
A study of the 't Hooft loop in SU(2) Yang-Mills theory
Ph. de Forcrand, M. D'Elia, M. Pepe
We study the behaviour of the spatial and temporal 't Hooft loop at zero and finite temperature in the 4D SU(2) Yang-Mills theory, using a new numerical method. In the deconfined p…
Vortices, monopoles and confinement
L Del Debbio, A Di Giacomo, B Lucini
We construct the creation operator of a vortex using the methods developed for monopoles. The vacuum expectation value of this operator is interpreted as a disorder parameter descr…
K0-K0bar Mixing with Wilson Fermions without Subtractions
D. Becirevic, Ph. Boucaud, V. Gimenez +4
By using suitable Ward identities, we show that it is possible to compute K0-K0bar mixing without subtracting the terms generated by explicit chiral symmetry breaking present in Wi…
A disorder analysis of the Ising model
J. M. Carmona, A. Di Giacomo, B. Lucini
Lattice studies of monopole condensation in QCD are based on the construction of a disorder parameter, a creation operator of monopoles which is written in terms of the gauge field…
Topological susceptibility in full QCD at zero and finite temperature
B. Alles, M. D'Elia, A. Di Giacomo
We present a study of the topological susceptibility on the lattice for full QCD with 2 and 4 flavours of staggered fermions at zero and finite temperature T. We find that …
Implementation of C* boundary conditions in the Hybrid Monte Carlo algorithm
J. M. Carmona, M. D'Elia, A. Di Giacomo +1
In the study of QCD dynamics, C* boundary conditions are physically relevant in certain cases. In this paper we study the implementation of these boundary conditions in the lattice…
One-loop renormalization of fermionic currents with the overlap-Dirac operator
C. Alexandrou, E. Follana, H. Panagopoulos +1
We compute the one-loop lattice renormalization of the two-quark operators , where denotes the generic Dirac matrix, for the lattice formulation of QCD using the over…
Topology in 2D CP**(N-1) models on the lattice: a critical comparison of different cooling techniques
B. Alles, L. Cosmai, M. D'Elia +1
Two-dimensional CP**(N-1) models are used to compare the behavior of different cooling techniques on the lattice. Cooling is one of the most frequently used tools to study on the l…