We derive general expressions for the cross section of neutrino scattering on electrons in dense, hot stellar matter, in the presence of strong magnetic fields. Numerical calculations of the scattering cross sections at various densities, temperatures and magnetic fields, are performed. Strong, quantizing magnetic fields modify significantly the angular and energy dependence of the scattering c...

A measurement of the inclusive cross-section for the photoproduction of protons in the central fragmentation region at HERA is presented. The measured cross-section is compared with the prediction of the PYTHIA MC model. The obtained value of the diquark suppression factor in the Lund string model is different from that obtained in ee data. The dependence of the cross-section as a function of t...

We study the Casimir force acting on a conducting piston with arbitrary cross section. We find the exact solution for a rectangular cross section and the first three terms in the asymptotic expansion for small height to width ratio when the cross section is arbitrary. Though weakened by the presence of the walls, the Casimir force turns out to be always attractive. Claims of repulsive Casimir f...

We present in detail the calculation of the O(α 3 s) inclusive total cross section for the process pp → tth in the Standard Model, at the Tevatron center-of-mass energy √ s H = 2 TeV. The next-to-leading order QCD corrections significantly reduce the renormalization and factorization scale dependence of the Born cross section. They slightly decrease or increase the Born cross section depending ...

Diffractive dissociation of virtual photons, γp → Xp, has been studied in ep interactions with the ZEUS detector at HERA using an integrated luminosity of ∼10 pb. The data cover photon virtualities 0.17 < Q < 0.70 GeV and 3 < Q < 80 GeV with 3 < MX < 38 GeV, where MX is the mass of the hadronic final state. Diffractive events were selected by two methods: the first required the detection of the...

The next-to-leading order three-jet cross section in hadron collisions is calculated in the simplified case when the matrix elements of all QCD subprocesses are approximated by the pure gluon matrix element. The longitudinallyinvariant k⊥ jet-clustering algorithm is used. The important property of reduced renormalization and factorization scale dependence of the next-toleading order physical cr...

Diffractive dissociation of virtual photons, γp → Xp, has been studied in ep interactions with the ZEUS detector at HERA. The data cover photon virtualities 0.17 < Q < 0.70 GeV and 3 < Q < 80 GeV with 3 < MX < 38 GeV, where MX is the mass of the hadronic final state. Diffractive events were selected by two methods: the first required the detection of the scattered proton in the ZEUS leading pro...

We demonstrate that the distinctive features of the forward differential cross section of diffractive leptoproduction of a vector meson can be legitimately calculated in perturbative QCD in terms of the light-cone qq̄ wave function of the vector meson and the gluon distribution of the target. In particular, we calculate the Q2 and nuclear dependence of the diffractive leptoproduction of vector m...

A three-parameter model based on the Whittle-Matérn correlation family is used to describe continuous random refractive-index fluctuations. The differential scattering cross section is derived from the index correlation function using nonscalar scattering formulas within the Born approximation. Parameters such as scattering coefficient, anisotropy factor, and spectral dependence are derived fro...

We present the first evaluation of color dipole cross section from experimental data on diffractive photoand electroproduction of vector mesons. The dipole-size and energy dependence of the found dipole cross section is consistent with expectations from the BFKL dynamics. E-mail: [email protected]