9 research outputs found
Measuring the deviation from the Rutherford formula
Modern experiments with heavy ion-leptons collisions open the possibility to
measure the deviation of cross section of small angles electron(positron)-ion
elastic scattering from the Rutherford formula due to multiple virtual photons
exchange. The charge asymmetry and the polarization of the scattered leptons
are calculated and numerical predictions are given. A generalization to elastic
proton-nucleus scattering is discussed.Comment: 4 pages, 4 figures, Brief Repor
QED peripheral mechanism of pair production at colliders
Cross section of the processes of neutral pion production as well as pairs of
charged fermions and bosons in peripherical interaction of leptons, photons are
calculated in main logarithmical approximation. We investigate the phase
volumes and differential cross sections. The differential cross section of few
neutral pions and a few pairs production are written down explicitly.
Considering the academic problem of summation on the number of pairs for the
case of massless particles we reproduce the known results obtained in seventies
of last century. The possibility to construct the generator for Monte-Carlo
modeling of this processes basing of this results are discussed.Comment: 25 pages, 5 figure
Bremsstrahlung and pair production processes at low energies, multi-differential cross section and polarization phenomena
Radiative electron-proton scattering is studied in peripheral kinematics,
where the scattered electron and photon move close to the direction of the
initial electron. Even in the case of unpolarized initial electron the photon
may have a definite polarization. The differential cross sections with
longitudinally or transversal polarized initial electron are calculated. The
same phenomena are considered for the production of an electron-positron pair
by the photon, where the final positron (electron) can be also polarized.
Differential distributions for the case of polarized initial photon are given.
Both cases of unscreened and completely screened atomic targets are considered.Comment: 15 pages, 6 figure