The decay K+ ->pi(+)v (v) over bar, with a very precisely predicted branching ratio of less than 10(-10) in the Standard Model framework, 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 such decay with a decay-in-flight technique, novel for this channel. The main goal of NA62 is to measure such Branching Ratio of K+ -> pi(+)v (v) over bar with an accuracy better than 20%. This will be achieved by collecting up to 100 K+ ->pi(+)v (v) over bar events with a background contamination at the level of 10%. The NA62 detector was commissioned in 2014 and 2015 and the experiment took physics data from 2015 to 2018. NA62 has already published the result of the 2016 data analysis. The 2017 data analysis is in progress, the single event sensitivity reached and the evaluation of the main backgrounds will be shown in this contribution.
Status of the NA62 Experiment
Piccini, M;Anzivino, G;Barbanera, M;Brizioli, F;Checcucci, B;Imbergamo, E;Lollini, R;Piandani, R;Volpe, R;
2020
Abstract
The decay K+ ->pi(+)v (v) over bar, with a very precisely predicted branching ratio of less than 10(-10) in the Standard Model framework, 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 such decay with a decay-in-flight technique, novel for this channel. The main goal of NA62 is to measure such Branching Ratio of K+ -> pi(+)v (v) over bar with an accuracy better than 20%. This will be achieved by collecting up to 100 K+ ->pi(+)v (v) over bar events with a background contamination at the level of 10%. The NA62 detector was commissioned in 2014 and 2015 and the experiment took physics data from 2015 to 2018. NA62 has already published the result of the 2016 data analysis. The 2017 data analysis is in progress, the single event sensitivity reached and the evaluation of the main backgrounds will be shown in this contribution.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
