32 citations · 493 across the 47 of their papers we have counts for
23 papers · 1 filter
On the Fermion Level Crossing in the Electroweak Instanton Background
P. E. Mogaddam, S. S. Gousheh
We investigate fermion level crossing in the electroweak instanton background, taking into account the Euclidean-time dependence of the fermion energy throughout our analysis, from…
Fermion Zero Modes and Fermion number of the 't Hooft-Polyakov Monopole
P. E. Mogaddam, S. S. Gousheh
Fermion bound states in the background of the 't Hooft-Polyakov SU(2) monopole are investigated for various values of gauge coupling constant , the Higgs self-coupling constant…
Casimir free energy for massive scalars: a comparative study of various approaches
M. Sasanpour, S. S. Gousheh
We compute the Casimir thermodynamic quantities for a massive real scalar field between two parallel plates with the Dirichlet boundary conditions, using three different general ap…
Casimir free energy for massive fermions: a comparative study of various approaches
M. Sasanpour, C. Ajilyan, S. S. Gousheh
We compute the Casimir thermodynamic quantities for a massive fermion field between two parallel plates with the MIT boundary conditions, using three different general approaches a…
Fermion Number 1/2 of Sphalerons and Spectral Mirror Symmetry
M. Mehraeen, S. S. Gousheh
We present a rederivation of the baryon and lepton numbers of the S sphaleron of the standard electroweak theory based on spectral mirror symmetry. We explo…
Massive Jackiw-Rebbi Model
Farid Charmchi, Siamak S. Gousheh
In this paper we analyze a generalized Jackiw-Rebbi (J-R) model in which a massive fermion is coupled to the kink of the model as a prescribed background field. We solve thi…
Vacuum Polarization and Casimir Energy of a Dirac Field Induced by a Scalar Potential in One Spatial Dimension
Siamak S. Gousheh, Soheila S. Mousavi, Leila Shahkarami
We investigate the vacuum polarization and the Casimir energy of a Dirac field coupled to a scalar potential in one spatial dimension. Both of these effects have a common cause whi…
A Complete Spectral Analysis of the Jackiw-Rebbi Model, Including its Zero Mode
Farid Charmchi, Siamak S. Gousheh
In this paper we present a complete and exact spectral analysis of the -dimensional model that Jackiw and Rebbi considered to show that the half-integral fermion numbers are…
One-loop quantum correction to the mass of the supersymmetric Kink in (1 + 1) dimensions using the exact spectra and the phase shifts
Farid Charmchi, Siamak S. Gousheh, Seyed Morteza Hosseini
We compute the quantum correction to the mass of the kink at the one-loop level in (1+1) dimensions with minimal supersymmetry. In this paper we discuss this issue from the Casimir…
Exact Solutions of a Fermion-Soliton System in Two Dimensions
Leila Shahkarami, Siamak S. Gousheh
We investigate a coupled system of a Dirac particle and a pseudoscalar field in the form of a soliton in (1+1) dimensions and find some of its exact solutions numerically. We solve…
An Investigation of the Casimir Energy for a Fermion Coupled to the Sine-Gordon Soliton with Parity Decomposition
Siamak S. Gousheh, Azadeh Mohammadi, Leila Shahkarami
We consider a fermion chirally coupled to a prescribed pseudoscalar field in the form of the soliton of the sine-Gordon model and calculate and investigate the Casimir energy and a…
Casimir Energy for a Coupled Fermion-Soliton System
Leila Shahkarami, Azadeh Mohammadi, Siamak Sadat Gousheh
In this paper we compute the Casimir energy for a coupled fermion-pseudoscalar field system. In the model considered in this paper the pseudoscalar field is \textit{static} and \te…
Casimir Energy for a Coupled Fermion-Kink System and its stability
Siamak Sadat Gousheh, Azadeh Mohammadi, Leila Shahkarami
We compute the Casimir energy for a system consisting of a fermion and a pseudoscalar field in the form of a prescribed kink. This model is not exactly solvable and we use the phas…
The Radiative Corrections to the Mass of the Kink Using an Alternative Renormalization Program
S. S. Gousheh, A. Mohammadi, M. Asghari +2
In this paper we compute the radiative correction to the mass of the kink in theory in 1+1 dimensions, using an alternative renormalization program. In this newly proposed re…
Casimir Energy For a Massive Dirac Field in One Spatial Dimension: A Direct Approach
R. Saghian, M. A. Valuyan, A. Seyedzahedi +1
In this paper we calculate the Casimir energy for a massive fermionic field confined between two points in one spatial dimension, with the MIT Bag Model boundary condition. We comp…
A Renormalization Program for Systems with Non-Perturbative Conditions
Siamak S. Gousheh, Farid Charmchi
In this paper we introduce an alternative renormalization program for systems with non-perturbative conditions. The non-perturbative conditions that we concentrate on in this paper…
Radiative Correction to the Dirichlet Casimir Energy for Theory in Two Spatial Dimensions
S. S. Gousheh, R. Moazzemi, M. A. Valuyan
In this paper, we calculate the next to the leading order Casimir energy for real massive and massless scalar fields within theory, confined between two parallel plates wi…
Dirichlet Casimir Energy for a Scalar Field in a Sphere: An Alternative Method
M. A. Valuyan, S. S. Gousheh
In this paper we compute the leading order of the Casimir energy for a free massless scalar field confined in a sphere in three spatial dimensions, with the Dirichlet boundary cond…
A Renormalized perturbation theory for problems with nontrivial boundary conditions or backgrounds in two space-time dimensions
Reza Moazzemi, Abdollah Mohammadi, Siamak S. Gousheh
In this paper we discuss the effects of nontrivial boundary conditions or backgrounds, including non-perturbative ones, on the renormalization program for systems in two dimensions…
A Direct Approach to the Electromagnetic Casimir Energy in a Rectangular Waveguide
Madad Ali Valuyan, Reza Moazzemi, Siamak S. Gousheh
In this paper we compute the leading order Casimir energy for the electromagnetic field (EM) in an open ended perfectly conducting rectangular waveguide in three spatial dimensions…
Radiative corrections to the mass of the Kink: a small modification due to the different renormalization procedure
Siamak S. Gousheh, Abdollah Mohammadi, Maryam Asghari +1
We compute of the lowest order quantum radiative correction to the mass of the kink in theory in 1+1 dimensions using an alternative renormalization procedure which has been…
A new renormalization approach to the Dirichlet Casimir effect for ϕ^4 theory in (1+1) dimensions
Reza Moazzemi, Siamak S. Gousheh
The next to the leading order Casimir effect for a real scalar field, within theory, confined between two parallel plates is calculated in one spatial dimension. Here we use…
The Dirichlet Casimir effect for theory in (3+1) dimensions: A new renormalization approach
Reza Moazzemi, Maryam Namdar, Siamak S. Gousheh
We calculate the next to the leading order Casimir effect for a real scalar field, within theory, confined between two parallel plates in three spatial dimensions with the Di…