Recent results and prospects from NA62

A large sample of charged kaon decays in 2007 has been collected by the NA62 experiment at CERN SPS using the experimental setup of the former NA48 experiment. Its intense kaon beam provides an abundant source of tagged neutral pions in vacuum. A measurement of the electromagnetic transition form factor slope of the neutral pion from 1:05 × 10⁶ fully reconstructed π⁰ Dalitz decays is presented. The obtained preliminary value a = (3.70 ± 0.53_stat ± 0.36_syst) × 10⁻² is the first 5.8σ observation of a non-zero slope in the time-like region of momentum transfer. K⁺ → π⁺ vv-bar is a theoretically very clean decay where indirect effects of new physics may be detectable. The NA62 apparatus has been significantly upgraded between 2008 and 2014 in order to measure the branching ratio of this decay with 10% precision. The NA62 experiment took data with the new setup in pilot runs in 2014 and 2015, reaching the design beam intensity. Results of first data quality studies in view of the 2016-2017 physics runs are presented.