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
Search for production of an invisible dark photon from π0 decays at NA62 / Mirra M., Aliberti R., Ambrosino F., Ammendola R., Angelucci B., Antonelli A., Anzivino G., Arcidiacono R., Bache T., Barbanera M., Bernhard J., Biagioni A., Bician L., Biino C., Bizzeti A., Blazek T., Bloch-Devaux B., Bonaiuto V., Boretto M., Bragadireanu M., et al.. - ELETTRONICO. - (2019), pp. 73-76. (54th Rencontres de Moriond on QCD and High Energy Interactions 2019 Aosta Valley, ita 2019).
Search for production of an invisible dark photon from π0 decays at NA62
Bizzeti A.
;Bucci F.
;Iacopini E.
;Latino G.
;Lenti M.
;Ruggiero G.
;Volpe R.
;
2019
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 FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.



