abstract

We study the structure of divergences of the one-loop effective action for two Abelian models with non-minimal torsion coupling. Some previous results are corrected and problems of non-minimal interactions are discussed.

abstract

We review the experimental status on KNO scaling and its violations in proton-anti-proton collisions. We especially emphasize the possible solution to this problem in the parton branching model. In this model there is a new non-scaling law for the probability distribution \(P_{mn}\) of \(m\) quarks and \(n\) gluons. For very high energies, we can neglect quark evolution and find the exact analytic solution for the observables such as multiplicities, probability distribution and multiplicity moments. We fit the experimental data remarkably well with the assumption that initial number of gluons \(n_0\) increases slowly with energy while the initial number of quarks \(m_0\) decreases slowly with energy. Exciting theoretical predictions for the Tevatron Collider energies are presented.

abstract

The methods used to calculate electroweak radiative corrections on the toponium resonance are discussed. Prospects for the measurement at LEP of these one-loop effects are examined.

abstract

The ultimate goal of ultra-relativistic heavy ion physics is the creation and detection of a new form of matter, the so-called Quark–Gluon Plasma (QGP). The QGP is a state of matter in which normal nuclear matter has been compressed to such an extent that the colour force field between the constituents of the nucleon is sufficiently screened that a deconfinement phase transition takes place. This paper presents a review of experimental possibilities of the WASO experiment to detect signatures of the QGP phase and some first results.

abstract

We compute single nucleon emission cross sections in infinite nuclear matter within the context of a consistent, relativistic field theory with a conserved electromagnetic current. Special emphasis is placed on calculation of the 4 nuclear response functions, the full differential coincidence cross sections, the integrated singles cross section, and the Coulomb sum rule. Experimental inelastic cross sections can be used to fit the two free parameters in our theory for specific nuclei. Also, we analyze the kinematics required to measure the “out of plane” response functions.

abstract

We found that within the Glashow–Salam–Weinberg model with four generations of fermions one cannot obtain a big magnetic moment of the electron (muon, tau) neutrino.