$K^+\rightarrow \pi^+\nu\bar\nu$ decay and NP searches at NA62

TL;DR

The NA62 experiment at CERN aims to precisely measure the rare $K^+ ightarrow \pi^+ uar u$ decay to search for new physics effects, with initial results from early data and future prospects discussed.

Contribution

This paper reports on the status and initial results of the NA62 experiment's search for the rare kaon decay, highlighting its potential to uncover physics beyond the Standard Model.

Findings

Initial data analysis with 5 ext{ } of 2016 data completed.

The experiment is on track to achieve 10 ext{ } measurement precision.

Prospects for future data collection and broader physics goals are outlined.

Abstract

$K\rightarrow \pi\nu \bar\nu$ is one of the theoretically cleanest meson decay where to look for indirect effects of new physics complementary to LHC searches. The NA62 experiment at CERN SPS is designed to measure the branching ratio of the $K^+\rightarrow \pi^+\nu \bar\nu$ decay with 10\% precision. After commissioning, in 2016 first data set good for physics has been collected. The data taking is foreseen till the LS2 at the end of 2018. The analysis method has been tested with 5\% of the full 2016 statistics. Results obtained with this subsample will be shown. The status of the experiment will be reviewed, and prospects will be presented, together with a mention to the broader NA62 physics program.