In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2019, No. 5 ( 2019-05)
Abstract:
The results of a search for π 0 decays to a photon and an invisible massive dark photon at the NA62 experiment at the CERN SPS are reported. From a total of 4.12 × 10 8 tagged π 0 mesons, no signal is observed. Assuming a kinetic-mixing interaction, limits are set on the dark photon coupling to the ordinary photon as a function of the dark photon mass, improving on previous searches in the mass range 60–110 MeV/ c 2 . The present results are interpreted in terms of an upper limit of the branching ratio of the electro-weak decay $$ {\pi}^0\to \gamma \nu \overline{\nu} $$ π 0 → γ ν ν ¯ , improving the current limit by more than three orders of magnitude.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP05(2019)182
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2019
detail.hit.zdb_id:
2027350-2