ISSN 0253-2778

CN 34-1054/N

Open AccessOpen Access JUSTC

Search for dark photons in π0 decays at NA48 and NA62

Cite this:
https://doi.org/10.3969/j.issn.0253-2778.2016.07.009
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  • Author Bio:

    GONNELLA Francesco, PhD. Research field: high energy physics. E-mail: francesco.gonnella@lnf.infn.it

  • Received Date: 30 November 2015
  • Rev Recd Date: 20 April 2016
  • Publish Date: 31 July 2016
  • The NA48/2 experiment at CERN collected, between 2003 and 2004, 1.69×107 fully reconstructed π0→γe+e- in the kinematic range mee>10 MeV/c2, with a negligible background contamination. The sample is analysed to search for the presence of dark photons (A′) via the decay chain π0→γA′, A′→e+e-. No signal has been observed, and the exclusion limits on space of the dark photon mass mA′ and the mixing parameter 2 are reported.
    The NA48/2 experiment at CERN collected, between 2003 and 2004, 1.69×107 fully reconstructed π0→γe+e- in the kinematic range mee>10 MeV/c2, with a negligible background contamination. The sample is analysed to search for the presence of dark photons (A′) via the decay chain π0→γA′, A′→e+e-. No signal has been observed, and the exclusion limits on space of the dark photon mass mA′ and the mixing parameter 2 are reported.
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