27 Oct/20
11:00 - 12:00 (Europe/Zurich)

Measurement of $Br(K^+ \rightarrow \pi^+ \nu \bar{\nu})$ with the NA62 experiment at CERN SPS


Francesco Brizioli



The decay $K^{+} \rightarrow \pi^{+} \nu \bar{\nu}$, with a very precisely predicted branching ratio of less than $10^{-10}$, is one of the best candidates to reveal indirect effects of new physics at the highest mass scales. The NA62 experiment at CERN SPS is designed to measure   $Br(K^{+} \rightarrow \pi^{+} \nu \bar{\nu})$ with a decay-in-flight technique, novel for this channel. NA62 took data in 2016, 2017 and 2018. Statistics collected in 2016 and 2017 allows NA62 to reach the Standard Model sensitivity for  $K^{+} \rightarrow \pi^{+} \nu \bar{\nu}$; the analysis of the 2018 data leads to the most precise measurement ever performed. The preliminary result of $Br(K^{+} \rightarrow \pi^{+} \nu \bar{\nu})$ measurement from the analysis of the full data set 2016-2017-2018 is presented, and prospects for future reviewed.

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