Jun 5 – 9, 2023
Genova, Italy
Europe/Rome timezone

Latest results and precision measurements from the NA62 experiment

Jun 6, 2023, 2:00 PM
DAD - Room 0B (Genova, Italy)

DAD - Room 0B

Genova, Italy

Contributed Hadrons and physics beyond the standard model Hadrons and physics beyond the standard model


Jacopo Pinzino (Istituto Nazionale di Fisica Nucleare)


The NA62 experiment at CERN collected the world’s largest dataset of charged
kaon decays in 2016-2018, leading to the first measurement of the branching
ratio of the ultra-rare K+ → π+ν ̄ν decay, based on 20 candidates, and presented
in 2021. In this talk the NA62 experiment reports new results from analyses
of K+ → π+μ+μ− and K+ → π+γγ decays, using a data sample recorded in
2017–2018. The K+ → π+μ+μ− sample comprises about 27k signal events with
negligible background contamination, and the presented analysis results include
the most precise determination of the branching ratio and the form factor. The
K+ → π+γγ sample contains about 4k signal events with 10% background
contamination, and the analysis improves the precision of the branching ratio
measurement by a factor of 3 with respect to the previous measurements.
The NA62 experiment can also be run as a “beam-dump experiment” by
removing the Kaon production target and moving the upstream collimators
into a “closed” position. More than 1017 protons on target have been collected
in this way during a week-long data-taking campaign by the NA62 experiment.
We report on new results from analysis of this data, with a particular emphasis
on Dark Photon and Axion-like particle Models.

Primary authors

Angela Romano (University of Birmingham) Jacopo Pinzino (Istituto Nazionale di Fisica Nucleare)

Presentation materials