Speaker
Description
The NA62 experiment at CERN collected the world's largest dataset of charged kaon decays in 2016-2018, leading to the first measurement of the Branching Fraction of the ultra-rare K+ --> pi+ nu nu decay, based on 20 candidates. This provides evidence for the very rare K+→π+νν¯ decay, observed with a significance of 3.4σ. This measurement is also used to set limits on BR(K+→π+X), where X is a scalar or pseudo-scalar particle. The analysis of the 2018 data sample and the future NA62 plans and prospects are reviewed.
Results from studies of the radiative kaon decays K+ → pi0e+vg (Ke3g) are reported, using a data sample of O(100k) Ke3g candidates with sub-percent background contaminations recorded in 2017-2018. Preliminary results with the most precise measurements of the Ke3g branching ratios and of T-asymmetry in the Ke3g decay are presented.
The flavour-changing neutral current decay K+ -> pi+ mu+ mu- is induced at the one-loop level in the Standard Model. Preliminary results from an analysis of the K+ -> pi+ mu+ mu- decay an the most precise determination of the decay form-factor parameters 𝑎+ and 𝑏+ made by NA62 using data collected in 2017 and 2018 is reported.
Preliminary results of the K± → µ ± π0π0ν (Kmu400) decay first observation and analysis based on the NA48/2 data collected in 2003-2004 are also described.
Details
N/A
| Is this abstract from experiment? | Yes |
|---|---|
| Name of experiment and experimental site | https://na62.web.cern.ch/ |
| Is the speaker for that presentation defined? | No |
| Internet talk | Maybe |
