Polarized light propagating in a magnetic field as a probe for millicharged fermions.

  title={Polarized light propagating in a magnetic field as a probe for millicharged fermions.},
  author={Holger Gies and Joerg Jaeckel and Andreas Ringwald},
  journal={Physical review letters},
  volume={97 14},
Possible extensions of the standard model of particle physics suggest the existence of particles with small, unquantized electric charge. Photon-initiated pair production of millicharged fermions in a magnetic field would manifest itself as a vacuum magnetic (VM) dichroism. We show that laser polarization experiments searching for this effect yield, in the mass range below 0.1 eV, much stronger constraints on millicharged fermions than previous laboratory searches. VM birefringence due to… Expand
Anomaly induced effects in a magnetic field
We consider a modification of electrodynamics by an additional light massive vector field, interacting with the photon via Chern-Simons-like coupling. This theory predicts observable effects for theExpand
Impact of spin-zero particle-photon interactions on light polarization in external magnetic fields
If the recent PVLAS results on polarization changes of a linearly polarized laser beam passing through a magnetic field are interpreted by an axion-like particle, it is almost certain that it is notExpand
Accelerator cavities as a probe of millicharged particles
We investigate Schwinger pair production of millicharged fermions in the strong electric field of cavities used for particle accelerators. Even without a direct detection mechanism at hand,Expand
Quantum Vacuum Polarization Searches with High Power Lasers Below the Pair Production Regime
For high enough electromagnetic fields, such as those that can be achieved by ultra-intense laser pulses, light is expected to interact with light through the interchange of virtual particles. A richExpand
New limit on millicharged particles from reactor neutrino experiments and the PVLAS anomaly
It has been recently suggested that the vacuum magnetic dichroism observed by the PVLAS experiment could be explained by the pair production of a new light, m ~0.1 eV, millicharged, q ~ 3 10^{-6} e,Expand
Light dark matter candidates in intense laser pulses II: the relevance of the spin degrees of freedom
A bstractOptical searches assisted by the field of a laser pulse might allow for exploring a variety of not yet detected dark matter candidates such as hidden-photons and scalar minichargedExpand
Effective field theory approach to light propagation in an external magnetic field
The recent PVLAS experiment observed rotation of polarization and ellipticity when a linearly polarized laser beam passes through a transverse magnetic field. The phenomenon cannot be explained inExpand
A number of experiments are underway to detect vacuum birefringence and dichroism — PVLAS, Q & A, and BMV. Recently, PVLAS experiment has observed optical rotation in vacuum by a magnetic fieldExpand
Minicharged particles search by strong laser pulse-induced vacuum polarization effects
Abstract Laser-based searches of the yet unobserved vacuum birefringence might be sensitive for very light hypothetical particles carrying a tiny fraction of the electron charge. We show that, withExpand
Light dark matter candidates in intense laser pulses I: paraphotons and fermionic minicharged particles
A bstractPolarimetric experiments driven by the strong field of a circularly polarized laser wave can become a powerful tool to limit the parameter space of not yet detected hidden-photons andExpand


Stars as Laboratories for Fundamental Physics: The Astrophysics of Neutrinos, Axions, and Other Weakly Interacting Particles
Preface Acknowledgments 1: The Energy-Loss Argument 2: Anomalous Stellar Energy Losses Bounded by Observations 3: Particles Interacting with Electrons and Baryons 4: Processes in a Nuclear Medium 5:Expand