Physics
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003idm..conf..414b&link_type=abstract
THE IDENTIFICATION OF DARK MATTER. Proceedings of the Fourth International Workshop. Held 2 - 6 September 2002 in York, UK. Edit
Physics
Dark Matter, Experiments, Detectors, Axions
Scientific paper
In the PVLAS apparatus a polarised laser beam is used to probe the structure of quantum vacuum when it is perturbed by an external magnetic field. The photon-photon scattering process, taking place in the field region, could result in the production of light scalar/pseudoscalar particles coupled to two photons thought to be dark matter candidates. The photon-photon scattering induces a change in the polarisation state of the laser beam, and can be detected by optical techniques. The PVLAS collaboration has been operating the apparatus for about two years, and the available sets of data show the presence of a signal believed to originate within the magnetic field region. Preliminary results from the data sets will be presented, along with a brief discussion.
Bregant M.
Cantatore Giovanni
Carusotto S.
Della Valle F.
di Domenico G.
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