For a lattice regularized chiral-invariant SU(2)L× SU(2)R fermion-scalar model with a Yukawa coupling y and a Wilson-Yukawa coupling w, we investigate the phase structure and in particular show the existence of the multicritical line, in the strong Yukawa and/or Wilson Yukawa coupling region, at which four phases meet. The result is in good agreement with the Monte Carlo simulation. This analyt...

We show that at arbitrary value of the scalar self coupling and small Yukawa coupling y the 2d Higgs-Yukawa model with Z(2) symmetry remains in the broken phase and the model is asymptotically free: y → 0 as the cut-off Λ → ∞. This is in agreement with a recent conjecture based on numerical simulation results. The Higgs-Yukawa model has been shown to be equivalent to a generalized Nambu-JonaLas...

Pair-correlation functions and phase separation in a two-component point Yukawa uid. Articles you may be interested in Interfacial and wetting properties of a binary point Yukawa fluid Microphase separation in multigraft copolymer melts studied by random-phase approximation and self-consistent field theory Phase separation of a binary two-dimensional core-softened fluid Solvent-mediated interac...

We consider SU(2)-equivariant dimensional reduction of Yang-Mills-Dirac theory on manifolds of the form M × CP , with emphasis on the effects of non-trivial magnetic flux on CP . The reduction of Yang-Mills fields gives a chain of coupled Yang-Mills-Higgs systems on M with a Higgs potential leading to dynamical symmetry breaking, as a consequence of the monopole fields. The reduction of SU(2)-s...

Lowest-order cross sections for q q production and annihilation can be approximately corrected for higher-order QCD e ects by using a corrective Kfactor. For energies where quark masses cannot be ignored, the K-factor is dominated by the wave function distortion arising from the initialor nalstate interaction between the quark and the antiquark. We evaluate this Kfactor for q q production and a...

We study the influence of messenger Yukawa couplings and top, bottom and τ Yukawa couplings on the proton lifetime in SU(5) Supersymmetric GUT with dynamical supersymmetry breaking mechanism due to Dine and Nelson.

We estimate the magnitude of Lepton Flavour Violation (LFV) from the phase of the neutrino Yukawa matrix. In the minimal supersymmetric standard model with right-handed neutrinos, the LFV processes li → ljγ can appear through the slepton mixing, which comes from the renormalization group effect on the right-handed neutrino Yukawa interaction between the Grand Unified Theory scale and the heavy ...

We investigate the origin of phenomenologically interesting small Yukawa couplings in Type I string theory. Utilising the framework of intersecting sets of D9 and orthogonal D5 branes we demonstrate the connection between extra dimensional volumes and Yukawa couplings. For example, we show that extra dimensions with inverse lengths of 10 8 GeV can lead to 10 −10 Yukawa couplings. String selecti...

We investigate the effects of mesonic clouds on neutron electric and nucleon strange form factors in the framework of the chiral quark soliton model. We present a mechanism to identify the mesonic clouds and their Yukawa tail in the polarized Dirac sea. We find that, assuming hedgehog structures and semiclassical quantization, the neutron electric and the nucleon strange form factors are notice...

Lowest-order cross sections for qq̄ production and annihilation can be approximately corrected for higher-order QCD effects by using a corrective Kfactor. For energies where quark masses cannot be ignored, the K-factor is dominated by the wave function distortion arising from the initialor finalstate interaction between the quark and the antiquark. We evaluate this Kfactor for qq̄ production and ...