Polarization observables for millicharged particles in photon collisions

Abstract

Particles in a hidden sector can potentially acquire a small electric charge through their interaction with the Standard Model and can consequently be observed as millicharged particles. We systematically compute the production of millicharged scalar, fermion and vector boson particles in collisions of polarized photons. The presented calculation is model independent and is based purely on the assumptions of electromagnetic gauge invariance and unitarity. Polarization observables are evaluated and analyzed for each spin case. We show that the photon polarization asymmetries are a useful tool for discriminating between the spins of the produced millicharged particles. Phenomenological implications for searches of millicharged particles in dedicated photon-photon collision experiments are also discussed.

11 pages, 7 figures, Appendix added, same as published version

References in corpus (7)

• New Fixed-Target Experiments to Search for Dark Gauge Forces
• The PVLAS experiment: measuring vacuum magnetic birefringence and dichroism with a birefringent Fabry-Perot cavity
• Polarized Light Propagating in a Magnetic Field as a Probe of Millicharged Fermions
• Limits on Low Energy Photon-Photon Scattering from an Experiment on Magnetic Vacuum Birefringence
• Achievement of 35 MV/m in the Superconducting Nine-Cell Cavities for TESLA
• Accelerator Cavities as a Probe of Millicharged Particles
• A new constraint on millicharged dark matter from galaxy clusters

Cited by in corpus (4)

• Point Sources from Dissipative Dark Matter
• ALP production through non-linear Compton scattering in intense fields
• Passage of millicharged particles in the electron beam-dump: refining constraints from SLACmQ and estimating sensitivity of NA64e
• Minicharged particles search by strong laser pulse-induced vacuum polarization effects