I clarify the mistakes in hep-ph/9705427 (Remarks on the kinematics of the one-photon production in electron-proton scattering) about the phase space factor for the one-photon production in electronproton scattering and confirm that the earlier result given by Kroll, Schürmann and Guichon is right.

We have completed the next-to-leading order perturbative QCD corrections to the virtual-photon exclusive differential cross sections for heavy quark production in deep-inelastic electron-proton scattering, i.e. e + P → Q +Q +X . Using these results, we have computed distributions which are sensitive to correlations among the heavy quark, the heavy antiquark, and the associated jet. Some predict...

We present a new picture for the central regions of Black Hole X-ray Binaries. In our view, these central regions have a multi-flow configuration which consists in (1) an outer standard accretion disc down to a transition radius rJ , (2) an inner magnetized accretion disc below rJ driving (3) a non relativistic self-collimated electronproton jet surrounding, when adequate conditions for pair cr...

Elastic production of vector mesons in electronproton interaction has provided a deeper understanding of the diffraction phenomenon and finds a sensible description in a variety of models. The first attempts to describe diffractive photoproduction were based on vector dominance model [1] and Regge theory [2]. Since various aspects of the deep inelastic scattering and of elastic processes are bo...

Polarization and spin effects are useful for probing the Standard Model, in both the electroweak sector and the strong sector, where the spin decomposition of the nucleon is still a hot topic, with important new data on the net polarizations of the gluon and the strange quarks. Spin phenomena are also useful in searches for new physics, for example via measurements of the anomalous magnetic mom...

We place strong observational limits on any possible large-scale spatial variation in the values of physical ’constants’ whose space-time evolution is driven by a scalar field. The limits are imposed by the isotropy of the microwave background on large angular scales in theories which describe space and time variations in the fine structure constant, α, the electronproton mass ratio, μ, and the...

The reaction mechanisms of the following proton diffractive scattering processes are studied and compared with one another: γ∗p → V p, γ∗p → Xp, pp → (ΛK+)p and pA → ΛK+A (Here, γ∗ stands for the space-like photon in inelastic electronproton scattering, V for the vector mesons ρ, ω, φ, J/ψ, and A for a target nucleus.) It is shown that, by taking parity, and C–parity conservation into account, ...

A reanalysis of unpolarized electron-proton elastic scattering data is done in terms of the electric to magnetic form factor squared ratio. This observable is in principle more robust against experimental correlations and global normalizations. The present analysis shows indeed that it is a useful quantity that contains reliable and coherent information. The comparison with the ratio extracted ...

Thermal conductivity κ(T ) and thermoelectric power S(T ) studies on (Y,Gd)Ba2(Cu1−xMnx)3O7−δ (x 0.02) superconductors are presented here. Thermal conductivity for all the samples exhibits a hump below the superconducting transition temperature Tc. The peak height of the hump decreases with the Mn content in both the Yand Gd-based systems, barring GdBa2(Cu0.99Mn0.01)3O7−δ. The peak height reduc...