The NA62 experiment at CERN Super Proton Synchrotron was designed to measure BR(K+ → π+νv̄) with an in-fight technique, never used before for this measurement. This decay is characterised by a very precise prediction in the Standard Model. Its branching ratio, which is expected to be less than 10-10, is one of the best candidates to indicate indirect effects of new physics beyond SM at the highest mass scales. NA62 result on K+ → π+νv̄ from the full 2016 data set is described. Also a search for an invisible dark photon A′ has been performed, exploiting the efficient photon-veto capability and high resolution tracking of the NA62. 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.

Physics beyond the standard model with kaons at NA62 / Massarotti P., Aliberti R., Ambrosino F., Ammendola R., Angelucci B., Antonelli A., Anzivino G., Arcidiacono R., Barbanera M., Biagioni A., Bician L., Biino C., Bizzeti A., Blazek T., Bloch-Devaux B., Bonaiuto V., Boretto M., Bragadireanu M., Britton D., Brizioli F., et al.. - ELETTRONICO. - 2249:(2020), pp. 030003-030009. (15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019 ) [10.1063/5.0009508].

Physics beyond the standard model with kaons at NA62

Bizzeti A.
;
Bucci F.
;
Iacopini E.
;
Latino G.
;
Lenti M.
;
Ruggiero G.
;
Volpe R.
;
2020

Abstract

The NA62 experiment at CERN Super Proton Synchrotron was designed to measure BR(K+ → π+νv̄) with an in-fight technique, never used before for this measurement. This decay is characterised by a very precise prediction in the Standard Model. Its branching ratio, which is expected to be less than 10-10, is one of the best candidates to indicate indirect effects of new physics beyond SM at the highest mass scales. NA62 result on K+ → π+νv̄ from the full 2016 data set is described. Also a search for an invisible dark photon A′ has been performed, exploiting the efficient photon-veto capability and high resolution tracking of the NA62. 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.
2020
AIP Conference Proceedings
15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019
Goal 9: Industry, Innovation, and Infrastructure
Massarotti P.; Aliberti R.; Ambrosino F.; Ammendola R.; Angelucci B.; Antonelli A.; Anzivino G.; Arcidiacono R.; Barbanera M.; Biagioni A.; Bician L.;...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1209012
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