Photon-Veto Counters at the Outer Edge of the Endcap Calorimeter for the KOTO Experiment

T. Matsumura, T. Shinkawa, H. Yokota +17

The Outer-Edge Veto (OEV) counter subsystem for extra-photon detection from the backgrounds for the? $K_L^0\to {\pi }^0\nu \bar{\nu }$ decay is located at the outer edge of the endcap Cs…