A search for an invisible dark photon A' has been performed, exploiting the efficient photon-veto capability and high resolution tracking of the NA62 detector at CERN. The signal stems from the chain K+ → π+π0 followed by π0 → A'γ. No significant statistical excess has been identified. Upper limits on the dark photon coupling to the ordinary photon as a function of the dark photon mass have been set, improving on the previous limits over the mass range 60–110 MeV/c2
Mirra, M., Aliberti, R., Ambrosino, F., Ammendola, R., Angelucci, B., Antonelli, A., et al. (2019). Search for production of an invisible dark photon from π0 decays at NA62. In Proceedings of the 54th Rencontres de Moriond - 2019 QCD and High Energy Interactions (pp.73-76). ARISF.
Search for production of an invisible dark photon from π0 decays at NA62
Ammendola R.;Bonaiuto V.;Sargeni F.;
2019-01-01
Abstract
A search for an invisible dark photon A' has been performed, exploiting the efficient photon-veto capability and high resolution tracking of the NA62 detector at CERN. The signal stems from the chain K+ → π+π0 followed by π0 → A'γ. No significant statistical excess has been identified. Upper limits on the dark photon coupling to the ordinary photon as a function of the dark photon mass have been set, improving on the previous limits over the mass range 60–110 MeV/c2I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
