kaon

If an anti-Y particle collided with a proton, said proton would turn into a theta particle and a kaon.
如果用一个反”Y“粒子碰撞一个质子，该质子将衰变成一个”θ“粒子和一个K中介子。
And that kaon could be detected by any machine looking for proton decays, namely Japan's SuperKamiokande detector (pictured top).
而K中介子能被任何质子衰变探测仪探测到，比如日本的超级神冈探测器（精度最高）。