It is shown that the binding effect that is associated with the short range part of the Goldstone boson exchange interaction between constituent quarks provides a good description of the πN σ-term.

A few years ago, flow equations were introduced as a technique for calculating the ground-state energies of cold Bose gases with and without impurities. In this paper, we extend approach to compute observables other than energy. As an example, calculate densities, phase fluctuations one-dimensional one two For single mobile impurity, use validate mean-field results obtained upon Lee-Low-Pines t...

Introduction In this section, we list coupling-strength and mass limits for light neutral scalar or pseudoscalar bosons that couple weakly to normal matter and radiation. Such bosons may arise from a global spontaneously broken U(1) symmetry, resulting in a massless Nambu-Goldstone (NG) boson. If there is a small explicit symmetry breaking, either already in the Lagrangian or due to quantum eff...

Abstract We propose a new dihedral angle observable for measuring the CP property of interaction between top quark and Higgs boson in production at 14 TeV Large Hadron Collider (LHC). consider two decay modes boson, $H\to b\bar{b}$?> \gamma\gamma$?> , demonstrate that distribution is able to distinguish CP-even CP-odd hypothesis 95% confidence level, with an integrated lum...

The status of precision electroweak measurements as of summer 2002 is reviewed. The recent results on the anomalous magnetic moment of the muon and on neutrino-nucleon scattering are discussed. Precision results on the electroweak interaction obtained by the experiments at the SLC, LEP and TEVATRON colliders are presented. The experimental results are compared with the predictions of the minima...

We derive a bosonic Hamiltonian from two dimensional QCD on the light-front. To obtain the bosonic theory we find that it is useful to apply the boson expansion method which is the standard technique in quantum many-body physics. We introduce bilocal boson operators to represent the gauge-invariant quark bilinears and then local boson operators as the collective states of the bilocal bosons. If...

We use a time-dependent dynamical mean-field-hydrodynamic model to study the formation of fermionic bright solitons in a trapped degenerate Fermi gas mixed with a Bose-Einstein condensate in a quasi-onedimensional cigar-shaped geometry. Due to a strong Pauli-blocking repulsion among spin-polarized fermions at short distances there cannot be bright fermionic solitons in the case of repulsive bos...

We investigate the uncertainty induced by the Higgs-boson mass on the determination of mW from the LEP-2 run near the threshold for W -pair production. For a light Higgs boson the Yukawa interaction between the two slowly-moving W bosons gives rise to a correction of close to 1% to the total cross-section. This corresponds to a 15 MeV shift in the deduced W mass for a Higgs-boson mass of 60 GeV...