University of 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 1994Show all

41 papers · 1 filter

hep-lat1994★ 4 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-lat1994

Asymptotic scaling from strong coupling in 2-d lattice chiral models

M. Campostrini, P. Rossi, E. Vicari

Two dimensional $N = \infty$ lattice chiral models are investigate by a strong coupling analysis. Strong coupling expansion turns out to be predictive for the evaluation of continuum…

hep-lat1994★ 1 cited

Strong coupling expansion of chiral models

M. Campostrini, P. Rossi, E. Vicari

A general precedure is outlined for an algorithmic implementation of the strong coupling expansion of lattice chiral models on arbitrary lattices. A symbolic character expansion in…

hep-th1994★ 5 cited

Simplicial Chiral Models

Paolo Rossi, Chung-I Tan

Principal chiral models on a d-1 dimensional simplex are introduced and studied analytically in the large $N$ limit. The $d = 0, 2, 4$ and $\infty$ models are explicitly solved. Re…

hep-lat1994★ 3 cited

Master Wilson loop operators in large-N lattice QCD $_{2}$

P. Rossi, E. Vicari

An explicit solution is found for the most general independent correlation functions in lattice QCD $_{2}$ with Wilson action. The large- $N$ limit of these correlations may be used to…

hep-lat1994★ 1 cited

On $T$ dependence of the static potential $V (T; R)$ in a finite volume

G. ~Cella, V. K. ~Mitrjushkin, A. ~Viceré

We study the dependence on $T$ of the static potential $V (T; R)$ defined from Wilson loops and from Polyakov loop correlators on a finite lattice. For this study we employ a…

hep-lat1994★ 8 cited

Two-Dimensional $O (3)$ $σ$ -Model up to Correlation Length $1 0^{5}$

Sergio Caracciolo, Robert G. Edwards, Andrea Pelissetto +1

We carry out a high-precision Monte Carlo simulation of the two-dimensional $O (3)$ -invariant $σ$ -model at correlation lengths $ξ$ up to $\sim 1 0^{5}$ . Our work employs a new and powe…

hep-lat1994★ 2 cited

New Method for the Extrapolation of Finite-Size Data to Infinite Volume

Sergio Caracciolo, Robert G. Edwards, Sabino J. Ferreira +2

We present a simple and powerful method for extrapolating finite-volume Monte Carlo data to infinite volume, based on finite-size-scaling theory. We discuss carefully its systemati…

nucl-th1994

The Effective Non-Relativistic Hamiltonian for Electron-Nucleus Interaction

R. Ya. Kezerashvili

We present the effective Hamiltonian for an electron-nucleus interaction in non-relativistic limit up to the second order in the inverse nucleon mass. This Hamiltonian takes into a…

hep-ph1994★ 33 cited

Biased discrete symmetry and domain wall problem

G. Dvali, Z. Tavartkiladze, J. Nanobashvili

We reconsider a cosmological evolution of domain walls produced by spontaneous breaking of an approxime discrete symmetry. We show, that domain walls may never collapse even if the…

hep-lat1994★ 6 cited

Monopole condensation ans superconductivity: the $S U (2)$ case

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

We study the behaviour of a suitably defined disorder parameter, showing for the first time monopole condenssation in the ground state of QCD.

hep-lat1994★ 4 cited

Monopole condensation in the ground state of gauge theories: a disorder parameter

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

We construct a disorder parameter for dual superconductivity of the ground state of $U (1)$ gauge theory.

hep-lat1994★ 94 cited

Asymptotic Scaling in the Two-Dimensional $O (3)$ $σ$ -Model at Correlation Length $1 0^{5}$

Sergio Caracciolo, Robert G. Edwards, Andrea Pelissetto +1

We carry out a high-precision Monte Carlo simulation of the two-dimensional $O (3)$ -invariant $σ$ -model at correlation lengths $ξ$ up to $\sim 1 0^{5}$ . Our work employs a new and powe…

hep-lat1994★ 1 cited

Continuum limit of field theories regularized on a random lattice

B. Alles, M. Beccaria, L. Del Debbio +1

The continuum limit and scaling properties of an asymptotically free field theory regularized on a random lattice are compared with those on a regular square lattice. We work on ra…

hep-ph1994★ 12 cited

Light thresholds in Grand Unified Theories

R. Barbieri, P. Ciafaloni, A. Strumia

In a generic Grand Unified Theory with a relatively small dispersion of the spectrum around the $Z$ -boson and the unification masses, a connection is established, exact at one loop…

hep-th1994★ 5 cited

Spectral stochastic processes arising in quantum mechanical models with a non-L2 ground state

J. Loffelholz, G. Morchio, F. Strocchi

A functional integral representation is given for a large class of quantum mechanical models with a non--L2 ground state. As a prototype the particle in a periodic potential is dis…

hep-ex1994★ 21 cited

Polarized Bhabha Scattering and a Precision Measurement of the Electron Neutral Current Couplings

the SLD Collaboration

We present the first measurement of the left-right asymmetry in Bhabha scattering with a polarized electron beam. The effective electron vector and axial vector couplings to the Z0…

hep-ph1994★ 347 cited

Signals For Supersymmetric Unification

R. Barbieri, L. J. Hall

Using the Yukawa couplings of the minimal supersymmetric SU(5) model, the rates for $μ \to e γ$ , $μ \to e$ conversion and $τ \to μ γ$ are computed. For a selectron mass of 100 GeV, and…

hep-lat1994★ 24 cited

Heating and small-size instantons in the $O (3) σ$ model on the lattice

F. Farchioni, A. Papa

We study the role of small-size instantons in the determination of the topological susceptibility of the 2-d $O (3) σ$ model on the lattice. In particular, we analyze how they af…

hep-ph1994

Semiglobal Alice Strings

G. Dvali, G. Senjanovi'{c}

We show that in certain theories with topologically trivial quotient space of spontaneously broken gauge symmetry there can exist topologically stable strings that carry nonabelian…

astro-ph1994★ 7 cited

Bright Stars in the Galactic Globular M5

E. Brocato, V. Castellani, V. Ripepi

We present a CCD investigation of the galactic globular M5 aimed to increase the statistical relevance of the available sample of evolving bright stars. Previous investigations, li…

hep-ph1994★ 19 cited

Fermion masses and mixings in a flavour symmetric GUT

Riccardo Barbieri, Gia Dvali, Alessandro Strumia

We describe a supersymmetric Grand Unified Theory based on the gauge group $\SU(5)^3$, or $\SO(10)^3$, invariant under the interchange of any~SU(5), or~SO(10), with each family mul…

hep-ph1994★ 648 cited

Large Scale Structure and Supersymmetric Inflation without Fine Tuning

G. Dvali, Q. Shafi, R. Schaefer

We explore constraints on the spectral index $n$ of density fluctuations and the neutrino energy density fraction $Ω_{H D M}$ , employing data from a variety of large scale observatio…

hep-ph1994★ 84 cited

Flavour in supersymmetric Grand Unification: a democratic approach

R. Barbieri, Z. Berezhiani, G. Dvali +2

We consider the flavour problem in a supersymmetric Grand Unified theory with gauged SU(6) group, where the Higgs doublets are understood as pseudo-Goldstone bosons of a larger $\S…

Running coupling constant and correlation length from Wilson loops

Asymptotic scaling from strong coupling in 2-d lattice chiral models

Strong coupling expansion of chiral models

Simplicial Chiral Models

Master Wilson loop operators in large-N lattice QCD2​

On T dependence of the static potential V(T;R) in a finite volume

Two-Dimensional O(3) σ-Model up to Correlation Length 105

New Method for the Extrapolation of Finite-Size Data to Infinite Volume

The Effective Non-Relativistic Hamiltonian for Electron-Nucleus Interaction

Biased discrete symmetry and domain wall problem

Monopole condensation ans superconductivity: the SU(2) case

Monopole condensation in the ground state of gauge theories: a disorder parameter

Asymptotic Scaling in the Two-Dimensional O(3) σ-Model at Correlation Length 105

Continuum limit of field theories regularized on a random lattice

Light thresholds in Grand Unified Theories

Spectral stochastic processes arising in quantum mechanical models with a non-L2 ground state

Polarized Bhabha Scattering and a Precision Measurement of the Electron Neutral Current Couplings

Signals For Supersymmetric Unification

Heating and small-size instantons in the O(3)σ model on the lattice

Semiglobal Alice Strings

Bright Stars in the Galactic Globular M5

Fermion masses and mixings in a flavour symmetric GUT

Large Scale Structure and Supersymmetric Inflation without Fine Tuning

Flavour in supersymmetric Grand Unification: a democratic approach

Master Wilson loop operators in large-N lattice QCD $_{2}$

On $T$ dependence of the static potential $V (T; R)$ in a finite volume

Two-Dimensional $O (3)$ $σ$ -Model up to Correlation Length $1 0^{5}$

Monopole condensation ans superconductivity: the $S U (2)$ case

Asymptotic Scaling in the Two-Dimensional $O (3)$ $σ$ -Model at Correlation Length $1 0^{5}$

Heating and small-size instantons in the $O (3) σ$ model on the lattice