We study the dilepton-dijet signal in the dominant Higgs production channel at a linear e+e− collider. We estimate the effects of Universal Extra Dimension (UED) by a simple analysis of the cross-sections. The heavy Kaluza-Klein excitations of the Standard Model fields in UED can significantly alter the decay properties of the Higgs boson to loop-driven final states. We show that by taking a si...

In the energy region below 1 GeV, neutrino-scattering off nuclei is dominated by quasi-elastic processes. Several effects influence the outcome of these reactions, and the result of cross section calculations depends on choices in model and parameterization. We discuss the main sensitivities of quasi-elastic processes and their influence on cross section results.

The nature of the thermodynamic behavior of Type I superconductor particles, having a cross section less than the Ginzburg-Landau temperature dependent coherence length, ξ(T), is discussed for magnetic field induced adiabatic phase transitions from the superconductive state to the normal state. Argument is advanced supporting the view that when the adiabatic magnetocaloric process is applied to...

Details are given of the observation by H1 of events containing high-PT leptons in addition to large missing PT. A closely related ZEUS analysis, including a preliminary measurement of the W production cross section, is discussed and the two experiments are compared. Some possible non-standard model sources for the events are considered.

We extend the non-commutative standard model based on the minimal SU(3)×SU(2)× U(1) gauge group to include the interaction of photon with neutrino. We show that, in the gauge invariant manner, only the right handed neutrino can directly couple to the photon. Consequently, we obtained the Feynman rule for the γνν̄-vertex which is not already existed in the minimal extension of non-commutative sta...

Recently, a conceptually new physics beyond the Standard Model (SM), unparticle, has been proposed, where a hidden conformal sector is coupled to the SM sector through higher dimensional operators. In this setup, we investigate unparticle physics at the photon collider, in particular, unparticle effects on the γγ → γγ process. Since this process occurs at loop level in the SM, the unparticle ef...

We present recent CDF results on the properties of hadrons containing heavy quarks. These include the measurements of mass, lifetime and relative cross section of the B c meson and an updated measurement of the B 0 s and Λ 0 b lifetime. We also summarize new measurements of the mass of the Σ b baryon.

The cross section of e + e − → π + π − π + π − has been measured for center-of-mass energy from 0.6 GeV to 4.5 GeV by BABAR collaboration. We apply these experimental data to fit the theoretical cross section derived from the VMD(Vector Meson Dominance) model. At the same time, the relevant parameters have been deduced from the fitting, and the isovector form factor has also been obtained.

We use an s-channel picture of hard hadronic collisions to investigate the parton distribution function for quarks at small momentum fraction x, which corresponds to very high energy scattering. We study the renormalized quark distribution at one loop in this approach. In the high-energy picture, the quark distribution function is expressed in terms of a Wilson-line correlator that represents t...