Concept

Théorie de jauge sur réseau

Publications associées (49)

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Anomalous solitons

Matthias Schmid

Solitons are stable, non-singular solutions to the classical equations of motion of non-linear field theory. Their energy is localized and finite and their shape remains unaltered during propagation. For this reason they represent particle-like states in f ...

EPFL2008

Anomalous Abelian solitons

Matthias Schmid

The chiral Abelian Higgs model contains an interesting class of solitons found by Rubakov and Tavkhelidze. These objects carry non-zero fermion number NF (or Chern-Simons number NCS, what is the same because of the chiral anomaly) and are stable for suffic ...

2007

Anomalies in field theories with extra dimensions

Claudio Scrucca

We give an overview of the issue of anomalies in field theories with extra dimensions. We start by reviewing in a pedagogical way the computation of the standard perturbative gauge and gravitational anomalies on noncompact spaces, using Fujikawa's approach ...

2004

Bethe approximation for self-interacting lattice trees

Paolo De Los Rios

In this paper we develop a Bethe approximation, based on the cluster variation method, which is apt to study lattice models of branched polymers. We show that the method is extremely accurate in cases where exact results are known as, for instance, in the ...

EDP Sciences2001

Calculations of the phonon dispersion curves of C2H2, OC(ND2)(2), and Na2CO3 from generic force field

Gervais Chapuis

The phonon dispersion curves of cubic acetylene, tetragonal urea, and monoclinic sodium carbonate are calculated from the generic force field using the direct method. The force constants of the dynamical matrix are determined from the forces induced by the ...

1999

Sufficient conditions for the existence of Q-balls in gauge theories

1998

Unity of supersymmetry breaking models

Riccardo Rattazzi

We examine the models with gauge group U(1)(k-1) x Pi(i=1)(k) SU(n(i)), which are obtained from decomposing the supersymmetry breaking model of Affleck, Dine and Seiberg containing an antisymmetric tensor field. We note that all of these models are distinc ...

1997

Radiative Quark Masses Constrained by the Gauge Group Only

Riccardo Rattazzi

We discuss the possibility of obtaining the observed pattern of quark masses and mixings as a consequence of radiative corrections, gauge invariance and particle content of the theory. We do not allow any kind of additional symmetry, such as family and dis ...

1991

THE PHENOMENOLOGY OF COLORED SCALARS

We study the phenomenology of light scalar quarks and the properties of a new family of hadrons containing such quarks in the framework of QCD taking into account non-perturbative effects caused by a possible existence of the condensate of the colored scal ...

1984