Search for $K^{+}\rightarrow\pi^{+}\nu\overline{\nu}$ at NA62

TL;DR

The NA62 experiment at CERN aims to precisely measure the rare decay $K^{+}\rightarrow\pi^{+}\nu\overline{\nu}$ to explore potential new physics effects beyond the Standard Model, complementing collider searches.

Contribution

This paper reports on the data collection and quality assessment of the NA62 experiment's pilot runs, advancing towards a precise measurement of the decay's branching ratio.

Findings

Data collected in 2014 and 2015 reached final beam intensity

2015 data quality assessed for final measurement

Preparation for 10 ext{%} precision in branching ratio measurement

Abstract

$K^{+}\rightarrow\pi^{+}\nu\overline{\nu}$ 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 this decay with 10\% precision. NA62 took data in pilot runs in 2014 and 2015 reaching the final designed beam intensity. The quality of 2015 data acquired, in view of the final measurement, will be presented.