Axions: Recent searches and new limits

Simple item page
dc.creatorRaffelt, Georg G.
dc.date2005-04-18
dc.date2005-05-02
dc.date.accessioned2026-07-07T03:54:38Z
dc.date.available2026-07-07T03:54:38Z
dc.descriptionThe CERN Axion Solar Telescope (CAST) experiment searches for solar axions by the "helioscope" method. First results imply an upper limit on the axion-photon coupling of g_a-gamma < 1.16 x 10^-10 GeV^-1 (95% CL) for m_a < 0.02 eV, in this mass range superseding the previous energy-loss limit from globular cluster stars. By virtue of a variable-pressure helium filling of the magnetic transition region, CAST II will extend the sensitivity to axion masses up to about 1 eV, for the first time testing realistic axion parameters in a laboratory experiment. In this mass range axions would contribute a cosmic hot dark matter component. New structure-formation limits imply that m_a < 1-2 eV. For the particular case of hadronic axions with a standard axion-pion coupling, the present-day cosmic axion density would be about 50 cm^-3 and the cosmic mass limit is m_a < 1.05 eV (95% CL). We also comment on the axion interpretation of the anomalous signature observed in the PVLAS experiment.
dc.descriptionContribution to XI International Workshop on "Neutrino Telescopes" (22-25 Feb 2005, Venice, Italy)
dc.identifierhttps://arxiv.org/abs/hep-ph/0504152
dc.identifierhttp://arxiv.org/abs/hep-ph/0504152
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/44319
dc.subjectHigh Energy Physics - Phenomenology
dc.titleAxions: Recent searches and new limits
dc.typetext

Files

Collections

arXiv