We calculate the screening potential of a fast parton moving through a quark-gluon plasma in the framework of semi-classical transport theory. We found an anisotropic potential showing a minimum in the direction of the parton velocity. Possible consequences of this potential on binary states in a quark-gluon plasma are discussed. Screening of charges in a plasma is an important collective effec...

We consider a class of seven-dimensional N = 1 supersymmetric orbifold GUTs in which the Standard Model (SM) gauge couplings and one of the Yukawa couplings (top quark, bottom quark or tau lepton) are unified, without low energy supersymmetry, at MGUT ≃ 4× 10 GeV. With gauge-top quark Yukawa coupling unification the SM Higgs boson mass is estimated to be 135± 6 GeV, which increases to 144± 4 Ge...

The minimal supersymmetric standard model with universal boundary conditions and 'asymptotic' Yukawa coupling unification is considered. The full one-loop effective potential for radiative electroweak symmetry breaking as well as the one-loop corrections to all the Higgs boson, b-quark and τ-lepton masses are included. The relic abundance of the lightest su-persymmetric particle (bino) is calcu...

Alain Connes’ construction of the standard model is based on a generalized Dirac-Yukawa operator and the K-cycle (H,D), with H a fermionic Hilbert space. If this construction is reformulated at the level of the differential algebra then a direct comparison with the alternative approach by the Marseille-Mainz group becomes possible. We do this for the case of the toy model based on the structure...

We perform a path-integral analysis of the string representation of the dual Abelian Higgs (DAH) model beyond the London limit, where the string describing the vortex of a flux tube has a finite thickness. We show that besides an additional vortex core contribution to the string tension, a modified Yukawa interaction appears as a boundary contribution in the type-II dual superconducting vacuum....

By solving the gap equation in the quenched, ladder approximation for an Abelian gauge model with Yukawa interaction in the presence of a constant magnetic field, we show that the Yukawa interactions enhance the dynamical generation of fermion mass. The theory is then studied at finite temperature, where we prove that the critical magnetic field, required for the mass generation to be important...

In the present work, we have studied differential scattering cross-section for ground states of charmonium and bottomonium in frame work medium-modified form quark-antiquark potential Born approximation using nonrelativistic quantum chromodynamics approach. To reach this end, quasiparticle (QP) Debye mass depending upon baryonic chemical ( <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1...

Models in which the gravitational and gauge interactions are unified at ∼ 1 TeV lead to the possibility that large extra dimensions would produce Yukawa-type corrections to the Newtonian gravitational law at small distances. In some models with n = 3 extra dimensions, deviations from Newto-nian gravity would occur at separations ∼ 5 nm, a distance scale accessible to an atomic force microscope ...