The KOTO experiment located at the J-PARC research facility in Tokai, Japan aims to measure the branching ratio (BR) of the rare decay of the neutral kaon, KL→π0 νν. This decay has a Standard Model (SM) predicted BR of 3 x 10-11. While it is extremely rare, it is an excellent probe to test for new physics beyond the SM as it directly violates charge-parity and has small theoretical uncertainties. The best experimental upper limit to date was set by the KOTO collaboration in 2019 of BR(KL→π0 νν) < 3.0 x 10-9 at the 90% C.L. using data collected in 2015, improving the previous best upper limit by an order of magnitude. From 2016 to 2018, KOTO collected around 1.5 times more data than in 2015, and the analysis of this dataset has been recently finalized. This talk will focus on the results of the 2016-2018 data set and the current status of the KOTO experiment.
Search for the Rare Decay of the Kaon, KL→π0 νν
The KOTO experiment located at the J-PARC research facility in Tokai, Japan aims to measure the branching ratio (BR) of the rare decay of the neutral kaon, KL→π0 νν. This talk will focus on the results of the 2016-2018 data set and the current status of the KOTO experiment.
Host: Ziqing Hong