The vertical jump is a commonly used test and widely studied in literature. Indeed, it is one of the most prevalent method of assessment on sport performance because the jump height is highly correlated with leg extensor muscles power. This paper deals with the study on a new contact mat system whose performances have been compared with a force platform. Some tests have been performed and the relative comparative results will be presented. The study shows a significant concurrent validity of Wi-JumpLe system for the flight and ground contact time measurements. In conclusion, the new contact mat structure together with the electronic measurement system is legitimate to assess vertical jump height and leg extensors muscle power.

The status of the experiment NA62 is reviewed. With its construction and commissioning completed, the experiment is now ready to tackle the measurement of K + → π + νν.

The rare decay K + → π + νν is an excellent process to probe Standard Model and indirectly search for new physics, complementary to the ongoing direct LHC searches. The NA62 experiment at CERN SPS aims to collect about 100 of such events in two years of data taking, keeping the background at the level of 10%. The physics motivation, experimental technique and status of the experiment are presented.

The rare decays K + → π + νν are excellent tool to make tests of new physics complementary to LHC thanks to their theoretically cleanness. The NA62 experiment at CERN SPS aims to collect of the order of 100 K + → π + νν events in two years of data taking, keeping the background at the level of 10%. Part of the experimental apparatus has been commissioned during the technical run in 2012. The physics prospects and status of the experiment will be reviewed.