We consider the three-dimensional Dirac equation in spherical coordinates with coupling to static electromagnetic potential. The space components of the potential have angular (non-central) dependence ...

The search for the decay μ + → e + e + e − with the SINDRUM spectrometer has been continued. The result is a new upper limit for the branching ratio B μ→3 e = Γ(μ→3 e ) Γ(μ→ e 2ν) < 1.0 × 10 −12 (90% ...

Using the data on deep inelastic muon scattering on iron and deuterium the ratio of the nucleon structure functions F 2 N ( Fe )/ F 2 N ( D ) is presented. The observed x -dependence of this ratio is ...

Polarization effects are considered in colliding γe and γγ beams, which are proposed to be obtained on the basis of linear e + e − colliders (by backward Compton scattering of laser light on electron ...

If high energy heavy ion collisions lead to the formation of a hot quark-gluon plasma, then colour screening prevents cc binding in the deconfined interior of the interaction region. To study this ...

We compute the four-loop (O(α 4 )) metric β-function for the bosonic two-dimensional non-linear σ-model. We employ an indirect method which obviates a significant part of the explicit calculation. Our ...

We present a calculation of the three-loop metric β-function for the bosonic non-linear sigma model. We also construct the action whose equations of motion coincide with the vanishing of the ...

We study N=∞ lattice gauge theory at finite temperature by Monte Carlo methods using an asymmetric coupling version of the twisted Equchi-Kawai model. The data favor a first-order deconfining ...

Differential elastic cross-section ratios and absolute cross sections have been measured for C12,13 at 29.2-and 49.5-MeV average π− energy and for O16,18 at 29.2 MeV. Range telescopes detected the ...

We compute exactly all the one-loop contributions to the amplitude A→Bγ, where A and B are fermions of the same charge, but different flavor, in the standard electroweak gauge model. The result is of ...

The requirement that P and T be approximately conserved in the color gauge theory of strong interactions without arbitrary adjustment of parameters is analyzed. Several possibilities are identified, ...

The beta-function for the grassmannian nonlinear σ-model of symmetry U (N) U (p) ∗ U (N−p) has been calculated directly in four-loop order in d =2+ ε dimensions. Using isomorphisms and information ...