The reconstruction of low-mass vector mesons (ρ, ω, φ) emitted out of the hot and dense phase of relativistic heavy ion collisions is one of the experimental goals of the CBM experiment. In this contribution the status on feasibility studies for their measurement will be summarized. Dominant background sources are random combinations of e− and e from π-Dalitz decay and γ conversion, the latter ...

We have studied the electron pair emission process from a Cu(111) surface excited by primary or photon beam. Although energy was 30 eV beam had an of 25 eV. will discuss and momentum distributions. The experiments with demonstrate that contributions Shockley state can be clearly identified. This is not case for work photons which we ascribe to low spectral weight contribution two electrons comp...

A modification of the variational configuration interaction functional in the first-order interacting space for molecular electronic structure is presented. The modified functional is a fully linked expression that by construction is extensive and invariant to transformations of the underlying orbital basis and is exact for an ensemble of separated two-electron subsystems. In addition, an appro...

Executive Summary We propose a program of study of the interaction of electrons and photons in fields approaching the critical QED field strength of an electron rest energy per Compton wavelength. This can be achieved in collisions between the picosecond pulses of a teraWatt laser and a 50-GeV electron beam. The phenomena accessible to study include nonlinear Compton scattering , trident produc...