The NA62 experiment at CERN is a high-intensity kaon decay experiment with a very broad physics program. Between 2016 and 2018, it collected the world’s largest dataset of K+ decays, which led to the first measurement of the branching ratio of the rare K+ → π+νν (PNN) decay, observed with a significance of 3.4σ. At the same time, several other new-physics (NP) studies are carried out. For example, the experiment is very active in the search for lepton-flavour/number-violating kaon decays, the most recent result concerning the K+ → µ-νe+e+ channel. Moreover, limits were recently set on the existence of evidence of a dark (pseudo-) scalar in the PNN dataset and hidden-sector mediators are sought in the K+ → π+e+e+e-e- channel. In 2021, the experiment was run in beam-dump mode for the first time. This allows for new searches for exotic particles — for instance, a massive dark photon which decays into a µ+µ- pair is sought.
PHYSICS BEYOND THE STANDARD MODEL WITH THE NA62 EXPERIMENT AT CERN
Soldani M.;Bandiera L.;Barbanera M.;Cenci P.;Cortina Gil E.;Cotta Ramusino A.;D'Agostini G.;Dalpiaz P.;D'Errico M.;Di Lella L.;Fry J.;Georgiev G.;Gianoli A.;Iacopini E.;Lanfranchi G.;Latino G.;Mazzolari A.;Menichetti E.;Neri I.;Norton A.;Pepe M.;Romagnoni M.;Ruggiero G.;Santoni C.;Soldani M.;Sytov A.;Turisini M.;Valente P.;Vicini P.;
2024
Abstract
The NA62 experiment at CERN is a high-intensity kaon decay experiment with a very broad physics program. Between 2016 and 2018, it collected the world’s largest dataset of K+ decays, which led to the first measurement of the branching ratio of the rare K+ → π+νν (PNN) decay, observed with a significance of 3.4σ. At the same time, several other new-physics (NP) studies are carried out. For example, the experiment is very active in the search for lepton-flavour/number-violating kaon decays, the most recent result concerning the K+ → µ-νe+e+ channel. Moreover, limits were recently set on the existence of evidence of a dark (pseudo-) scalar in the PNN dataset and hidden-sector mediators are sought in the K+ → π+e+e+e-e- channel. In 2021, the experiment was run in beam-dump mode for the first time. This allows for new searches for exotic particles — for instance, a massive dark photon which decays into a µ+µ- pair is sought.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.


