* Speaker : Prof. GeiYoub Lim (KEK)
* Abstract : The studies on Kaon decay have been a major role to construct the Standard Model and its flavor structure. Nowadays, K→pnn decay that is expressed as a transition of strange quark into down quark through Flavor Changing Neutral Current in the SM attracts large attention because of its high potential to figure out the new physics contribution. Extremely suppressed the SM contribution enables us to identify clearly (even tiny) new physics effect. On the other hands, it is very challenging in the experimental point of view to identify the signal after rejecting huge amount of backgrounds with limited observables and kinematics.
I would like to talk about a brief report on status of KOTO experiment searching for the K→pnn decay and introduction to the J-PARC (high-intensity proton accelerator in Japan), where the experiment is being performed.