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K+ → π+vv: First results from the NA62 experiment at CERN: Frascati Physics Series

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Published
Publication date25/07/2018
Host publicationProceedings, Vulcano Workshop 2018: Frontier Objects in Astrophysics and Particle Physics : Vulcano Island, Sicily, Italy, May 20-26, 2018
EditorsR. Fusco Femiano, G. Mannocchi, A. Morselli, G. C. Trinchero
PublisherINFN
Pages345-360
Number of pages16
ISBN (print)9788886409643
<mark>Original language</mark>English

Publication series

NameFrascati Physics Series
PublisherINFN
Volume66

Abstract

The decay K+ → π
+νν¯, 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 the branching ratio of the K+ → π
+νν¯ with a decay-inflight technique, novel for this channel. NA62 took data in 2016, 2017 and 2018.
Statistics collected in 2016 allows NA62 to reach the Standard Model sensitivity
for K+ → π
+νν¯, entering the domain of 10−10 single event sensitivity and
showing the proof of principle of the experiment. The preliminary result on
K+ → π
+νν¯ from the analysis of the 2016 data set is described.1