The SLAC electron-positron colliding beam facility and its associated magnetic detector facility are described. General experimental problems in performing photon-photon collision experiments at SPEAR and the proposed experiment of Masek et al. are discussed. -e (Talk presented at the International Colloquium on Photon-Photon Collisions in Electron-Positron Storage Rings, Paris, Sept. 3-4, 1973...

Currently, the only known way to obtain experimental information about the space-time structure of a heavy-ion collision is through two-particle momentum correlations. Azimuthally sensitive Hanbury-Brown–Twiss (HBT) intensity interferometry can complement elliptic flow measurements by constraining the spatial deformation of the source and its time evolution. Performing these measurements on pho...

In this talk, the productions of Q”g” states in two-photon collision and J/lc, radiative decays are discussed.

In this talk, the productions of Q2g2 states in two-photon collision and J/$ radiative decays are discussed.

We examine the process γγ → χ̃+τ− at photon-photon collider in the minimal supersymmetric standard model(MSSM) with R-parity violation, where all the oneloop diagrams are considered. We mainly discuss the effects of bilinear breaking terms, and conclude that their contributions may be important compared with trilinear terms. Our results show that the events of this process could be detectable at...

Resonance fluorescence is treated as a collision process where incident laser photons are scattered by an atom. Correlation signals are extracted from an expansion to the second order of the post collision field state. Photon antibunching effect appears as a quantum interference between al1 the possible scattering amplitudes. When Rayleigh photons are rejected, some amplitudes vanish, leading t...

We investigated the transmission of Dirac electrons through a potential barrier in the presence of circularly polarized light. An anomalous photon-assisted enhanced transmission is predicted and explained. It is demonstrated that the perfect transmission for nearly head-on collision in infinite graphene is suppressed in gapped dressed states of electrons, which is further accompanied by a shift...