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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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20 papers · 2 filters
Confinement: Results and Perspectives
A. Di Giacomo
An updated review is presented of lattice investigations of colour confinement.
Investigating QCD Vacuum on the lattice
A. Di Giacomo
Investigations on the structure of QCD vacuum from first principles can be done on the lattice. The mechanism of confinement is an example: results from lattice on it are reviewed.
Matrix elements of (delta S=2) operators with Wilson fermions
D. Becirevic, Ph. Boucaud, V. Gimenez +3
We test the recent proposal of using the Ward identities to compute the K0-K0bar mixing amplitude with Wilson fermions, without the problem of spurious lattice subtractions. From o…
Discrete non-Abelian groups and asymptotically free models
Sergio Caracciolo, Andrea Montanari, Andrea Pelissetto
We consider a two-dimensional -model with discrete icosahedral/dodecahedral symmetry. Using the perturbative renormalization group, we argue that this model has a different cont…
matrix elements beyond the leading-order chiral expansion
Ph. Boucaud, V. Giménez, C. -J. D. Lin +5
We propose an approach for calculating decays to the next-to-leading order in chiral expansion. A detailed numerical study of this approach is being performed.
The APENEXT project
F. Bodin, P. Boucaud, N. Cabibbo +31
APENEXT is a new generation APE processor, optimized for LGT simulations. The project follows the basic ideas of previous APE machines and develops simple and cheap parallel system…
Combined Relativistic and static analysis for all Delta B=2 operators
D. Becirevic, V. Gimenez, G. Martinelli +2
We analyse matrix elements of Delta B=2 operators by combining QCD results with the ones obtained in the static limit of HQET. The matching of all the QCD operators to HQET is made…
Extraction of K-->pipi Matrix Elements with Wilson Fermions
Ph. Boucaud, V. Gimenez, C. J. D. Lin +7
We present the status of a lattice calculation for the K-->pipi matrix elements of the (delta S=1) effective weak Hamiltonian, directly with two pion in the final state. We study t…
Spectrum of k-string tensions in SU(N) gauge theories
L. Del Debbio, H. Panagopoulos, P. Rossi +1
We compute, for the four-dimensional SU(4) and SU(6) gauge theories formulated on a lattice, the string tensions sigma_k related to sources with Z_N charge k, using Monte Carlo sim…
B-parameters of the complete set of matrix elements of (Delta B = 2) operators from the lattice
D. Becirevic, V. Gimenez, G. Martinelli +2
We compute on the lattice the ``bag'' parameters of the five (Delta B = 2) operators of the supersymmetric basis, by combining their values determined in full QCD and in the static…
Spin models on Platonic solids and asymptotic freedom
Sergio Caracciolo, Andrea Montanari, Andrea Pelissetto
We consider a two-dimensional sigma-model with discrete icosahedral/dodecahedral symmetry. We present high-precision finite-size numerical results that show that the continuum limi…
High-accuracy two-loop computation of the critical mass for Wilson fermions
Sergio Caracciolo, Andrea Pelissetto, Antonio Rago
We test an algebraic algorithm based on the coordinate-space method, evaluating with high accuracy the critical mass for Wilson fermions in lattice QCD at two loops. We test the re…
Confinement and monopole condensation: some properties of the disorder parameter
A. Di Giacomo, G. Paffuti
We demonstrate that the disorder parameter to detect dual superconductivity in the confining phase of QCD is the v.e.v. of a magnetically charged, Dirac like, gauge invariant…
Dual Superconductivity and Chiral Symmetry in Full QCD
J. M. Carmona, M. D'Elia, L. Del Debbio +3
A disorder parameter detecting dual superconductivity of the vacuum is measured across the chiral phase transition in full QCD with two flavours of dynamical staggered fermions. Th…
Hamiltonian Monte Carlo simulation of the two-dimensional Wess-Zumino model
Matteo Beccaria, Massimo Campostrini, Alessandra Feo
We study a Hamiltonian lattice version of the two-dimensional Wess-Zumino model. Preliminary results obtained by Quantum Monte Carlo with a many-parameter guiding wave function are…
Theory of color confinement: state of the art
A. Di Giacomo, G. Paffuti
The existing evidence for dual superconductivity as mechanism of color confinement is reviewed. We also discuss what is known on the dual excitations, which produce confinement by…
Two-loop critical mass for Wilson fermions
Sergio Caracciolo, Andrea Pelissetto, Antonio Rago
We have redone a recent two-loop computation of the critical mass for Wilson fermions in lattice QCD by evaluating Feynman integrals with the coordinate-space method. We present th…
Color confinement and dual superconductivity of the vacuum. III
J. M. Carmona, M. D'Elia, A. Di Giacomo +2
It is demonstrated that monopole condensation in the confined phase of SU(2) and SU(3) gauge theories is independent of the specific Abelian projection used to define the monopoles…
Understanding Color Confinement
Adriano Di Giacomo
An updated review is presented of our understanding of color confinement. Lattice results on condensation of magnetic charges are discussed. The role of vortices is analysed.
Asymptotically free models and discrete non-Abelian groups
Sergio Caracciolo, Andrea Montanari, Andrea Pelissetto
We study the two-dimensional renormalization-group flow induced by perturbations that reduce the global symmetry of the O(3) sigma-model to the discrete symmetries of Platonic soli…