Photon-dark photon conversions in extreme background electromagnetic fields

  title={Photon-dark photon conversions in extreme background electromagnetic fields},
  author={J.-F. Fortin and Kuver Sinha},
  journal={arXiv: High Energy Physics - Phenomenology},
The mixing of photons with light pseudoscalars in the presence of external electromagnetic fields has been used extensively to search for axion-like-particles. A similar effect for dark photon propagating states is usually not considered due to the Landau-Yang theorem. We point out that mixing between photon and dark photon propagating states in background electromagnetic fields can indeed occur, in non-linear QED, through a four-photon vertex by integrating out the electron box diagram… Expand
Probing dark gauge boson with observations from neutron stars
We present an investigation on the production of light dark photons by the nucleon bremsstrahlung processes in the core of neutron star. The dark photon is assumed to be a U(1)B−L gauge boson with aExpand
Axion spectra and the associated x-ray spectra of low-mass stars
Axion particles are among the best candidates to explain dark matter and resolve the strong CP problem in the Standard Model. If such a particle exists, the core of stars will produce them in largeExpand
Axion and dark photon limits from Crab Nebula high-energy gamma rays
The observation of cosmic sub-PeV gamma rays from the Crab Nebula opens up the possibility of testing cosmic ray photon transparency at the multi-hundred-TeV scale. Assuming no deviation from aExpand


Mixing of the photon with low-mass particles.
A formalism which is adapted to study the evolution of a photon (axion, graviton) beam in the presence of external fields is developed, and the possibility of detecting axions by a measurement of the magnetically induced birefringence of the vacuum is discussed. Expand
Probing Axions with Radiation from Magnetic Stars
Recent experiments suggest that polarized photons may couple significantly to pseudoscalar particles such as axions. We study the possible observational signatures of axion-photon coupling forExpand
Parametrically enhanced hidden photon search
Many theories beyond the Standard Model contain hidden photons. A light hidden photon will generically couple to the Standard Model through a kinetic mixing term, giving a powerful avenue forExpand
Constraining axion-like-particles with hard X-ray emission from magnetars
A bstractAxion-like particles (ALPs) produced in the core of a magnetar will convert to photons in the magnetosphere, leading to possible signatures in the hard X-ray band. We perform a detailedExpand
Photon splitting and photon dispersion in a strong magnetic field
We determine the refractive indices for photon propagation, and the absorption coefficient and polarization selection rules for photon splitting, in a strong constant magnetic field. Results areExpand
New stellar constraints on dark photons
Abstract We consider the stellar production of vector states V within the minimal model of “dark photons”. We show that when the Stuckelberg mass of the dark vector becomes smaller than plasmaExpand
Probing the quantum vacuum with petawatt lasers
Due to the bosonic nature of the photon, increasing the peak intensity through a combination of raising the pulse energy and decreasing the pulse duration will pile up more and more photons withinExpand
X-ray polarization signals from magnetars with axion-like-particles
A bstractAxion-like-particles (ALPs) produced in the core of a magnetar can convert to photons in the magnetosphere, giving rise to novel features in the X-ray spectrum. Since ALPs only mix with theExpand
High-Energy Vacuum Birefringence and Dichroism in an Ultrastrong Laser Field.
This work derives how a generally polarized probe photon beam is influenced by both vacuum birefringence and dichroism in a strong linearly polarized plane-wave laser field, and considers an experimental scheme to measure these effects in the nonperturbative high-energy regime. Expand
New CAST Limit on the Axion-Photon Interaction
During 2003--2015, the CERN Axion Solar Telescope (CAST) has searched for $a\to\gamma$ conversion in the 9 T magnetic field of a refurbished LHC test magnet that can be directed toward the Sun. InExpand