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% ...

(Translated from the Russian abstract): The Einstein Collection 1977 opens with the correspondence between A. Einstein and M. Besso, part of which was published in the Einstein Collections 1974, ...

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 ...

DUT, Durban and Stellenbosch U. and Catolica del Norte U.

We have measured the infrared spectra of two carbonates, FeCO 3 -siderite and MnCO 3 -rhodochrosite to pressures of 50 GPa at 300 K, and taken X-ray diffraction patterns of these phases before and ...

Differential cross sections were measured for pion elastic and inelastic scattering from Ca40,42,44,48 and Fe54 at Tπ=116.0,180.0, and 292.5 MeV. Elastic scattering was analyzed using a Kisslinger ...

The isospin-forbidden reaction d+d→π0+4He provides a very good test of the validity of charge symmetry. The forward differential cross section dσ/dΩ is estimated to be ≊0.12 pb/sr at a deuteron ...

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 ...

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 ...

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 ...