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19912026
Showing 2012 · hep-thShow all

37 papers · 2 filters

hep-th2012★ 8 cited

Higher-Derivative Wess-Zumino Model in Three Dimensions

E. A. Gallegos, C. R. Senise, A. J. da Silva

We deform the well-known three dimensional Wess-Zumino model by adding higher derivative operators (Lee-Wick operators) to its action. The effects of these operator…

hep-th2012★ 2 cited

Effective potential for a SUSY Lee-Wick model: the Wess-Zumino case

M. Dias, A. Yu. Petrov, C. R. Senise +1

Using a superfield generalization of the tadpole method, we study the one-loop effective potential for a Wess Zumino model modified by a higher-derivative term, inspired by the Lee…

hep-th2012★ 52 cited

Effects of a CPT-even and Lorentz-violating nonminimal coupling on the electron-positron scattering

R. Casana, M. M. Ferreira, R. V. Maluf +1

We propose a new \emph{CPT}-even and Lorentz-violating nonminimal coupling between fermions and Abelian gauge fields involving the CPT-even tensor of the standard…

hep-th2012★ 20 cited

Static post-Newtonian limits in non-projectable Hořava-Lifshitz gravity with an extra U(1) symmetry

Kai Lin, Anzhong Wang

In this paper, we study static post-Newtonian limits in non-projectable Hořava-Lifshitz gravity with an extra U(1) symmetry. After obtaining all static spherical solutions in the i…

hep-th2012★ 14 cited

Infrared divergences, mass shell singularities and gauge dependence of the dynamical fermion mass

Ashok K. Das, J. Frenkel, C. Schubert

We study the behavior of the dynamical fermion mass when infrared divergences and mass shell singularities are present in a gauge theory. In particular, in the massive Schwinger mo…

hep-th2012★ 29 cited

Twinlike models for kinks and compactons in flat and warped spacetime

D. Bazeia, A. S. Lobão, R. Menezes

This work deals with the presence of twinlike models in scalar field theories. We show how to build distinct scalar field theories having the same extended solution, with the same…

hep-th2012★ 4 cited

Nonanalyticity of the free energy in thermal field theory

F. T. Brandt, J. Frenkel, J. B. Siqueira

We study, in a d-dimensional space-time, the nonanalyticity of the thermal free energy in the scalar phi^4 theory as well as in QED. We find that the infrared divergent contributio…

hep-th2012★ 15 cited

Creation of neutral fermions with anomalous magnetic moments from a vacuum by inhomogeneous magnetic field

S. P. Gavrilov, D. M. Gitman

A consistent nonperturbative approach (based on QFT) to neutral fermion creation (due to their magnetic moments) in strong inhomogeneous magnetic fields is considered. It is demons…

hep-th2012★ 3 cited

Canonical quantization, path integral representations, and pseudoclassical description of massive Weyl neutrinos in external backgrounds

Maxim Dvornikov, D. M. Gitman

We study massive 1/2-spin particles in various external backgrounds keeping in mind applications to neutrino physics. We are mainly interested in massive Majorana (Weyl) fields. Ho…

hep-th2012★ 47 cited

Thermal photon production in a strongly coupled anisotropic plasma

Leonardo Patino, Diego Trancanelli

Photons produced in heavy ion collisions escape virtually unperturbed from the surrounding medium, thus representing an excellent probe of the conditions at the emission point. Usi…

hep-th2012★ 23 cited

Nonlinear magnetic response of the magnetized vacuum to applied electric field

Dmitry M. Gitman, Anatoly E. Shabad

We find first nonlinear correction to the field, produced by a static charge at rest in a background constant magnetic field. It is quadratic in the charge and purely magnetic. The…

hep-th2012★ 2 cited

Static Hopfion solutions of the extended Skyrme-Faddeev model

David Foster

We construct non-axially symmetric static soliton solutions, with non-zero topological charges, of an extension of the Skyrme-Faddeev model. The model has an extra quartic-derivati…

hep-th2012★ 18 cited

On the effective superpotential in the supersymmetric Chern-Simons theory with matter

M. Gomes, A. C. Lehum, J. R. Nascimento +2

We develop a superfield approach to the effective potential in the supersymmetric Chern-Simons theory coupled to matter, and, in Landau gauge, calculate the one-loop Kahlerian effe…

hep-th2012★ 20 cited

Braneworld solutions from scalar field in bimetric theory

D. Bazeia, F. A. Brito, F. G. Costa

We investigate the presence of braneworld solutions in a bimetric theory, with gravity and the scalar field coupling differently. We consider a non-standard model, with a Cuscuton-…

hep-th2012★ 25 cited

Study of models of the sine-Gordon type in flat and curved spacetime

D. Bazeia, L. Losano, R. Menezes +1

We study a new family of models of the sine-Gordon type, starting from the sine-Gordon model, including the double sine-Gordon, the triple one, and so on. The models appears as def…

hep-th2012

Some vortex solutions in the extended Skyrme-Faddeev model

L. A. Ferreira, M. Hayasaka, J. Jäykkä +2

Analytical and numerical vortex solutions for the extended Skyrme-Faddeev model in a (3+1) dimensional Minkowski space-time are investigated. The extension is obtained by adding to…

hep-th2012★ 8 cited

The r-matrix of the Alday-Arutyunov-Frolov model

A. Melikyan, G. Weber

We investigate the classical integrability of the Alday-Arutyunov-Frolov model, and show that the Lax connection can be reduced to a simpler 2 x 2 representation. Based on this res…

hep-th2012★ 4 cited

High temperature limit in static backgrounds

F. T. Brandt, J. B. Siqueira

We prove that the hard thermal loop contribution to static thermal amplitudes can be obtained by setting all the external four-momenta to zero before performing the Matsubara sums…

hep-th2012★ 46 cited

Quarkonium dissociation by anisotropy

Mariano Chernicoff, Daniel Fernandez, David Mateos +1

We compute the screening length for quarkonium mesons moving through an anisotropic, strongly coupled N=4 super Yang-Mills plasma by means of its gravity dual. We present the resul…

hep-th2012★ 2 cited

Hard Thermal Loops in the n-Dimensional phi3 Theory

F. T. Brandt, J. Frenkel

We derive a closed-form result for the leading thermal contributions which appear in the n-dimensional phi3 theory at high temperature. These contributions become local only in the…

hep-th2012★ 1 cited

Causal amplitudes in the Schwinger model at finite temperature

Ashok Das, R. R. Francisco, J. Frenkel

We show, in the imaginary time formalism, that the temperature dependent parts of all the retarded (advanced) amplitudes vanish in the Schwinger model. We trace this behavior to th…

hep-th2012★ 8 cited

Noncommutative magnetic moment, fundamental length and lepton size

T. C. Adorno, D. M. Gitman, A. E. Shabad

Upper bounds on fundamental length are discussed that follow from the fact that a magnetic moment is inherent in a charged particle in noncommutative (NC) electrodynamics. The stro…

hep-th2012★ 24 cited

Dynamics of a Dirac Fermion in the presence of spin noncommutativity

A. F. Ferrari, M. Gomes, V. G. Kupriyanov +1

Recently, it has been proposed a spacetime noncommutativity that involves spin degrees of freedom, here called "spin noncommutativity". One of the motivations for such a constructi…

hep-th2012★ 68 cited

Dirac fermions in strong electric field and quantum transport in graphene

S. P. Gavrilov, D. M. Gitman, N. Yokomizo

Our previous results on the nonperturbative calculations of the mean current and of the energy-momentum tensor in QED with the T-constant electric field are generalized to arbitrar…