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 1995Show all

53 papers · 1 filter

cond-mat1995★ 11 cited

A microscopic approach to the response of $^{3}$ He - $^{4}$ He mixtures

A. Fabrocini, L. Vichi, F. Mazzanti +1

Correlated Basis Function perturbation theory is used to evaluate the zero temperature response $S (q, ω)$ of $^{3}$ He- $^{4}$ He mixtures for inelastic neutron scattering, at momentum tra…

hep-ph1995★ 310 cited

Predictions From A U(2) Flavour Symmetry In Supersymmetric Theories

Riccardo Barbieri, George Dvali, Lawrence Hall

In a generic supersymmetric extension of the Standard Model, whether unified or not, a simple and well motivated U(2) symmetry, acting on the lightest two generations, completely s…

hep-lat1995

More On The SU(2) Deconfinement Transition In The Mixed Action

Rajiv V. Gavai, Manu Mathur

We examine certain issues related to the universality of the SU(2) lattice gauge theory at non-zero temperatures. Using Monte Carlo simulations and strong coupling expansions, we s…

hep-ph1995★ 41 cited

Electric dipole moments as signals of supersymmetric unification

R. Barbieri, A. Romanino, A. Strumia

If supersymmetric unification is true, we show how the combined effort of several experiments under way to try to measure an electric dipole moment of the electron or of the neutro…

hep-ex1995★ 12 cited

Measurement of the Average $B$ -Hadron Lifetime in $Z^{0}$ Decays

The SLD Collaboration

We report a measurement of the average $B$ -hadron lifetime using data collected with the SLD detector at the SLC in 1993. An inclusive analysis selected three-dimensional vertices…

quant-ph1995★ 59 cited

General relation between state density and dwell times in mesoscopic systems

Giuseppe Iannaccone

A relevant relation between the dwell time and the density of states for a three dimensional system of arbitrary shape with an arbitrary number of incoming channel is derived. This…

cond-mat1995★ 23 cited

A compact formula for the density of states in a quantum well

Giuseppe Iannaccone, Bruno Pellegrini

In this paper we derive a formula for the density of states in the presence of inelastic scattering in the quantum well of a double barrier structure as a function of a characteris…

cond-mat1995★ 18 cited

A unified approach to electron transport in double barrier structures

Giuseppe Iannaccone, Bruno Pellegrini

In this paper we show an approach to electron transport in double barrier structures which unifies the well known sequential and resonant tunneling models in the widest range of tr…

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★ 14 cited

Comparison between Theoretical Four-Loop Predictions and Monte Carlo Calculations in the Two-Dimensional $N$ -Vector Model for $N = 3, 4, 8$

Sergio Caracciolo, Robert G. Edwards, Tereza Mendes +2

We have computed the four-loop contribution to the beta-function and to the anomalous dimension of the field for the two-dimensional lattice $N$ -vector model. This allows the deter…

hep-lat1995★ 3 cited

Dynamic Critical Behavior of Multi-Grid Monte Carlo for Two-Dimensional Nonlinear $σ$ -Models

Gustavo Mana, Tereza Mendes, Andrea Pelissetto +1

We introduce a new and very convenient approach to multi-grid Monte Carlo (MGMC) algorithms for general nonlinear $σ$ -models: it is based on embedding an $X Y$ model into the given…

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★ 18 cited

Continuum Limits and Exact Finite-Size-Scaling Functions for One-Dimensional $O (N)$ -Invariant Spin Models

Attilio Cucchieri, Tereza Mendes, Andrea Pelissetto +1

We solve exactly the general one-dimensional $O (N)$ -invariant spin model taking values in the sphere $S^{N - 1}$ , with nearest-neighbor interactions, in finite volume with periodic b…

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-th1995★ 2 cited

Monte Carlo study of exact S-matrix duality in non simply laced affine Toda theories

Matteo Beccaria

The $(g_{2}^{(1)}, d_{4}^{(3)})$ \ pair of non simply laced affine Toda theories is studied from the point of view of non perturbative duality. The classical spectrum of each member is…

hep-th1995★ 34 cited

A remark on the high--energy quark--quark scattering and the eikonal approximation

Enrico Meggiolaro

In this paper we calculate the high--energy quark--quark scattering amplitude, first in the case of scalar QCD, using Fradkin's approach to derive the scalar quark propagator in an…

astro-ph1995

Star luminosity function as an age indicator for the Dwarf spheroidal Leo I

F. Caputo, V. Castellani, S. Degl'Innocenti

Star luminosity function, already recognized as an age indicator for old galactic globular clusters, can be used to contrains the age of younger stellar systems like the nearby dwa…

hep-ph1995★ 45 cited

Lepton Flavour Violations in SO(10) with large $tan β$

Paolo Ciafaloni, Andrea Romanino, Alessandro Strumia

In supersymmetric~SO(10) with large $tan β$ and Yukawa coupling unification $λ_{t} = λ_{b} = λ_{τ}$ , we compute the rates for lepton flavour violating processes. Experiments in progress or f…

A microscopic approach to the response of 3He -4He mixtures