We study Schwinger pair creation of charged particles due to the inhomogeneous electric field created by the thin electron layer at the surface of quark stars (the electrosphere). As suggested earlier, due to the low photon emissivity of the quark-gluon plasma and of the electrosphere, electron-positron pair emission could be the main observational signature of quark stars. To obtain the electr...

For the process e+e -+ p+p-(n) , the cross section and forward-backward charge asymmetry are measured at the highest ever center of mass energies which ranged from 130 to 183GeV. The data originates from 85pb 1 of integrated luminosity collected with the L3 detector at LEP. The measured muon pair cross section and forward-backward asymmetry agree with the Standard Model prediction with a XMI /N...

We have investigated the electron pair emission from a Cu(111) surface excited with a primary electron beam. We use the diffraction of electron pairs to identify the contribution of the Shockley surface state to the intensity. Exploring energy and momentum conservation laws makes it possible to select this state and to investigate the electron-electron interaction within this two-dimensional el...

In high energy electron-ion colliders, a new way to probe nucleon structure becomes available through diffractive reactions, where the incident particle produces very energetic almost forward particle. QCD describes these reactions as due exchange of Pomeron which may be perturbatively described dressed two-gluon state, provided hard scale allows factorization amplitude in terms two impact fact...

It is shown how pair production itself would almost certainly prevent the astrophysical formation of macroscopic dyadospheres, hypothetical regions, extending many electron Compton wavelengths in all directions, where the electric field exceeds the critical value for microscopically rapid Schwinger pair production. Pair production is a self-regulating process that would discharge a growing elec...

The process of radiation from high-energy electron and electron-positron pair production by a photon in oriented single crystal is considered using the method which permits inseparable consideration of both coherent and incoherent mechanisms of photon emission from an electron and of pair creation by a photon and includes the action of field of axis (or plane) as well as the multiple scattering...