Constraining resonant photon-axion conversions in the early universe

Link:
Autor/in:
Erscheinungsjahr:
2009
Medientyp:
Text
Schlagworte:
  • Dark matter
  • Photons
  • Axion-like particles
  • Decay
  • Quarks
  • Neutrinos
  • Dark matter
  • Photons
  • Axion-like particles
  • Decay
  • Quarks
  • Neutrinos
Beschreibung:
  • The presence of a primordial magnetic field would have induced resonant conversions between photons and axion-like particles (ALPs) during the thermal history of the Universe. These conversions would have distorted the blackbody spectrum of the cosmic microwave background (CMB). In this context, we derive bounds on the photon-ALP resonant conversions using the high precision CMB spectral data collected by the FIRAS instrument on board of the Cosmic Background Explorer. We obtain upper limits on the product of the photon-ALP coupling constant g times the magnetic field strength B down to gB less than or similar to 10(-13) GeV-1 nG for ALP masses below the eV scale.
  • The presence of a primordial magnetic field would have induced resonant conversions between photons and axion-like particles (ALPs) during the thermal history of the Universe. These conversions would have distorted the blackbody spectrum of the cosmic microwave background (CMB). In this context, we derive bounds on the photon-ALP resonant conversions using the high precision CMB spectral data collected by the FIRAS instrument on board of the Cosmic Background Explorer. We obtain upper limits on the product of the photon-ALP coupling constant g times the magnetic field strength B down to gB10 ≲ -13 GeV -1nG for ALP masses below the eV scale. © 2009 IOP Publishing Ltd and SISSA.
Lizenz:
  • info:eu-repo/semantics/openAccess
Quellsystem:
Forschungsinformationssystem der UHH
Interne Metadaten
Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/ed7ca50f-463e-4932-a9bc-f8e98db4cc88