436 research outputs found
Confining interquark potentials from nonabelian gauge theories coupled to dilaton
Following a recently proposed confinement generating mechanism, we provide a
new string inspired model with a massive dilaton and a new dilaton coupling
function [5]. By solving analytically the equations of motion, a new class of
confining interquark potentials is derived which includes several popular
potential forms given in the literature.Comment: 7 pages, based on hep-th/0311096. Presented at 10th International
Symposium on Meson-Nucleon Physics and the Structure of the Nucleon (MENU
2004), Beijing, China, 29 Aug - 4 Sep 200
On the implications of a dilaton in gauge theory
Some recent work on the implications of a dilaton in 4d gauge theories are
revisited. In part I of this paper we see how an effective dilaton coupling to
gauge kinetic term provides a simple attractive mechanism to generate
confinement. In particular, we put emphasis on the derivation of confining
analytical solutions and look into the problem how dilaton degrees of freedom
modify Coulom potential and when a confining phase occurs. In part II, we solve
the semi-relativistic wave equation, for Dick interquark potential using the
Shifted l-expansion technique (SLET) in the heavy quarkonium sector. The
results of this phenomenological analysis proves that these effective theories
can be relevant to model quark confinement and may shed some light on
confinement mechanism.Comment: 8 pages. Talk given at CTP Symposium on Supersymmetry at LHC:
Theoretical and Experimental Prospectives, Cairo, Egypt, 11-14 Mar 200
Bohr Hamiltonian with Hulth?en plus Ring shaped potential for triaxial nuclei
In this paper, we solve the eigenvalues and eigenvectors problem with Bohr
collective Hamil- tonian for triaxial nuclei. The ? beta part of the collective
potential is taken to be equal to Hulth?en potential while the gamma part is
defined by a new generalized potential obtained from a ring shaped one.
Analytical expressions for spectra and wave functions are derived by means of a
recent version of the asymptotic iteration method and the usual approximations.
The calculated energies and B(E2) transition rates are compared with
experimental data and the available theoretical results in the literature.Comment: 14 pages, 4 tables, 9 figures, accepted to be published in epj
- …