Stephen Sekula

Stephen Sekula at

From belle2collab on Twitter: First collisions in Phase 3 (Belle II physics run) recorded at #Belle2! electrons and positrons accelerated and stored by the SuperKEKB particle accelerator collided for the first time on 25 March 2019 10:44 GMT+09:00 at KEK in Tsukuba, Japan. Read More https://www.kek.jp/en/newsroom/2019/03/25/2030/ https://twitter.com/belle2collab/status/1110152884971163648/photo/1