Search of the rare decay of K_L to pi_0 nu nubar at J-PARC
by
Small Seminar Room
J-PARC KOTO is a dedicated experiment to search for the rareK_L to pi_0 nu nubar decay. This decay is special not only because of its direct CP violating process, but also its theoretical cleanness. In the standard model, the branching ratio of K_L to pi_0 nu nubar is calculated to be 3*10^-11 with only a few percent uncertainty, which provides a clean base to explore new physics through finding deviations from the standard model.
In the recently released results of data collected in 2015, the sensitivity of search was improved by an order of magnitude from the previous result and no event was observed in the signal region, with the prediction of 0.4 background event. In this talk, I will report the analysis and DAQ plan toward the sensitivity of O(-11).