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T: Fachverband Teilchenphysik
T 6: Flavour physics I
T 6.7: Vortrag
Montag, 15. März 2021, 17:30–17:45, Tf
Evidence for the decay K+ → π+ νν from the NA62 experiment at CERN — •Radoslav Marchevski — JGU Mainz
The ultra-rare decay K+ → π+ νν benefits from a precisely predicted branching ratio in the SM of (8.4 ± 1.0)× 10−11, being almost free from theoretical uncertainties, and most importantly of very high sensitivity to a variety of beyond-the-standard-model scenarios, making it one of the best candidates to reveal indirect effects of new physics in the flavour sector. The NA62 experiment at the CERN SPS, designed to measure the branching ratio of K+ → π+ νν with a decay-in-flight technique, collected data in 2016-2018. New results from the analysis of the 2018 data, the largest data set so far collected, will be presented. The result represents the most accurate measurement of this ultra-rare decay achieved so far. Future prospects and plans for further data taking starting in 2021 will also be presented.