Light-boson production in real or virtual photon-electron collisions

Gauge-Boson Production in Electron-Photon Collisions

We summarize results for the processes eγ → W−νe, e Z, eγ within the electroweak Standard Model. We discuss the essential features of the corresponding lowest-order cross-sections and present numerical results for the unpolarized cross-sections including the complete O(α) virtual, soft-photonic, and hard-photonic corrections. While at low energies the weak corrections are dominated by the leadi...

Sparticle Production in Electron - Photon Collisions

We explore the potential of electron-photon colliders to measure fundamental supersymmetry parameters via the processes eγ → ˜ e ˜ χ 0 (selectron-neutralino) and eγ → ˜ ν ˜ χ − (sneutrino-chargino). Given the˜χ 0 and˜χ − masses from e + e − and hadron collider studies, cross section ratios σ(γ −)/σ(γ +) for opposite photon helicities determine the˜ν L , ˜ e L and˜e R masses, independent of the ...

Identifying the Higgs boson in electron-photon collisions.

We analyze the production and detection of the Higgs boson in the next generation of linear ee colliders operating in the eγ mode. In particular, we study the production mechanism e + γ → eγγ → e + H, where one photon is generated via the laser backscattering mechanism, while the other is radiated via the usual bremsstrahlung process. We show that this is the most important mechanism for Higgs ...

Production of Pseudovector Heavy Quarkonia by Virtual Z Boson in Electron-positron Collisions * †

Production of low mass electron pairs due to the photon-photon mechanism in central collisions

We calculate the probability for dilepton production in central relativistic heavy ion collisions due to the gg mechanism. This is a potential background to more interesting mechanisms. We find that this mechanism is negligible in the CERES experiments. Generally, the contribution due to this mechanism is small in the central region, while it can be large for small invariant masses and forward ...