Open AccessSearch for the rare decay KL→π0νν¯ at J-PARC KOTO experiment
Author(s) -
Shuichi Shinohara
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1526/1/012002
Subject(s) - algorithm , computer science , artificial intelligence
The KOTO experiment aims to study the CP-violating rare decay K L → π 0 ν ν ¯ at J-PARC. The analysis of the data set taken in 2016, 2017 and 2018 is reported. In order to reduce backgrounds and to improve the signal acceptance, a new barrel photon detector and a new trigger system were installed and new analysis techniques were developed. The K L yield was 7.1×10 12 . The single event sensitivity was estimated to be 6.9×10 −10 , which was improved by a factor of 2 compared to the data set taken in 2015. The number of background events was estimated to be 0.05 ± 0.02. Four candidate events were observed in the signal region, and their studies are on-going extensively to nd their sources.