Istituto Nazionale di Fisica Nucleare, Sezione di Pisa

output

19922026

most citedObservation of Gravitational Waves from a Binary Black Hole Merger

14.2k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 1995 · hep-latShow all

18 papers · 2 filters

hep-lat1995★ 5 cited

Testing the heating method with perturbation theory

B. Alles, M. Beccaria, F. Farchioni

The renormalization constants present in the lattice evaluation of the topological susceptibility can be non-perturbatively calculated by using the so-called heating method. We tes…

hep-lat1995★ 15 cited

Renormalization group flow and fixed point of the lattice topological charge in the 2-d O(3) sigma-model

M. D'Elia, F. Farchioni, A. Papa

We study the renormalization group evolution up to the fixed point of the lattice topological susceptibility in the 2-d O(3) non-linear sigma-model. We start with a discretization…

hep-lat1995★ 42 cited

Improved lattice operators: the case of the topological charge density

C. Christou, A. Di Giacomo, H. Panagopoulos +1

We analyze the properties of a class of improved lattice topological charge density operators, constructed by a smearing-like procedure. By optimizing the choice of the parameters…

hep-lat1995★ 36 cited

Four-Loop Perturbative Expansion for the Lattice $N$ -Vector Model

Sergio Caracciolo, Andrea Pelissetto

We compute the four-loop contributions to the $β$ -function and the anomalous dimension of the field for the $O (N)$ -invariant $N$ -vector model. These results are used to compute the…

hep-lat1995★ 11 cited

Topological aspects of QCD

A. Di Giacomo

We review recent results from lattice on topological aspects of QCD: most of the results refer to monopoles and to instantons. We discuss in detail the evidence for condensation of…

hep-lat1995

Improving the topological charge density operator on the lattice

C. Christou, A. Di Giacomo, H. Panagopoulos +1

We analyze the properties of a class of improved lattice topological charge density operators, constructed by a smearing-like procedure. By optimizing the choice of the parameters…

hep-lat1995★ 44 cited

Chiral behaviour of the lattice $B_{K}$ -parameter with the Wilson and Clover Actions at $β = 6.0$

M. Crisafulli, A. Donini, V. Lubicz +4

We present results for the kaon $B$ -parameter $B_{K}$ from a sample of $200$ configurations using the Wilson action and $460$ configurations using the SW-Clover action, on a $18^3 \t…

hep-lat1995★ 3 cited

Application of the $O (N)$ -Hyperspherical Harmonics to the Study of the Continuum Limits of One-Dimensional $σ$ -Models and to the Generation of High-Temperature Expansions in Higher Dimensions

Massimo Campostrini, Attilio Cucchieri, Tereza Mendes +4

In this talk we present the exact solution of the most general one-dimensional $O (N)$ -invariant spin model taking values in the sphere $S^{N - 1}$ , with nearest-neighbour interaction…

hep-lat1995★ 1 cited

Running coupling constant and correlation length from Wilson loops

Massimo Campostrini, Paolo Rossi, Ettore Vicari

We consider a definition of the QCD running coupling constant $α (μ)$ related to Wilson loops of size $r \times t$ with arbitrary fixed $t / r$ . The schemes defined by these couplings…

hep-lat1995★ 8 cited

Strong-coupling expansion of lattice O(N) sigma models

Massimo Campostrini, Andrea Pelissetto, Paolo Rossi +1

We report progress in the computation and analysis of strong-coupling series of two- and three-dimensional $O (N)$ $σ$ models. We show that, through a combination of long stro…

hep-lat1995★ 4 cited

2-dimensional Regge gravity in the conformal gauge

Pietro Menotti, Pier Paolo Peirano

By restricting the functional integration to the Regge geometries, we give the discretized version of the well known path integral formulation of 2--dimensional quantum gravity in…

hep-lat1995★ 38 cited

The absence of cut--off effects for the fixed point action in 1--loop perturbation theory

F. Farchioni, P. Hasenfratz, F. Niedermayer +1

In order to support the formal renormalization group arguments that the fixed point action of an asymptotically free model gives cut--off independent physical predictions in 1--loo…

hep-lat1995★ 10 cited

Lattice energy-momentum tensor with Symanzik improved actions

A. Buonanno, G. Cella, G. Curci

We define the energy-momentum tensor on lattice for the $λ ϕ^{4}$ and for the nonlinear $σ$ -model Symanzik tree-improved actions, using Ward identities or an explicit matching procedu…

hep-lat1995★ 83 cited

Colour confinement as dual Meissner effect: $S U (2)$ gauge theory

L. Del Debbio, A. Di Giacomo, G. Paffuti +1

We demonstrate that confinement in $S U (2)$ gauge theory is produced by dual superconductivity of the vacuum. We show that for $T < T_{c}$ (temperature of deconfining phase transition…

hep-lat1995

Monopole Condensation in Gauge Theory Vacuum

Adriano di Giacomo

The condensation of monopoles (dual superconductivity) of QCD vacuum is reviewed. Direct evidence is produced that the system, in the confined phase, is a dual superconductor.

hep-lat1995★ 3 cited

The 2-dimensional non-linear sigma-model on a random latice

B. Alles, M. Beccaria

The O(n) non-linear $σ$ -model is simulated on 2-dimensional regular and random lattices. We use two different levels of randomness in the construction of the random lattices and gi…

hep-lat1995★ 20 cited

Topological charge density renormalization in the presence of dynamical fermions

B. Alles, A. Di Giacomo, H. Panagopoulos +1

We study the renormalization group behaviour of the topological charge density in full QCD on the lattice. We propose a way of extracting the necessary renormalization functions fr…