News

Jun 5, 2026

  • Research

Belle II accumulates the world’s largest Y(4S) dataset for more precise searches for new physics beyond the Standard Model

The Belle II experiment at the SuperKEKB electron-positron collider in KEK, in which Professor Iwasaki and Professor Nakano from our university's Experimental Particle Physics Group participate, has successfully accumulated the world's largest dataset of B-meson experimental data at the Υ(4S) resonance. The Belle II collaboration consists of more than 1,200 members from 28 countries and regions.

Having acquired this world-leading scale of B-meson data at Υ(4S), the project is expected to enable even more precise measurements and accelerate search efforts toward discovering new physics.

<Reference Link> https://www.kek.jp/en/press/202606051400

 

belle2

Photo of the Belle II detector © Belle II Collaboration/KEK