| Issue |
EPJ Web Conf.
Volume 126, 2016
4th International Conference on New Frontiers in Physics
|
|
|---|---|---|
| Article Number | 04035 | |
| Number of page(s) | 8 | |
| Section | Parallel | |
| DOI | https://doi.org/10.1051/epjconf/201612604035 | |
| Published online | 04 November 2016 | |
https://doi.org/10.1051/epjconf/201612604035
Search for the dark photon in π0 decays
INFN Pisa
a e-mail: roberto.piandani@cern.ch
Published online: 4 November 2016
A sample of 1.69 × 107 fully reconstructed π0 → γe+e− in the kinematic range mee > 10MeV/c2 with a negligible background contamination collected by the NA48/2 experiment at CERN in 2003-04 is analysed to search for the dark photon (A′) via the decay chain π;0 → γA′, A′ → e+e. No signal is observed, and preliminary exclusion limits on space of dark photon mass mA′ and mixing parameter ϵ2 are reported.
© The Authors, published by EDP Sciences, 2016
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