The Belle II collaboration consists of around 1,000 physicists, engineers and software developers from more than 100 institutes in 26 countries, among which Germany is the second-largest group after our colleagues from Japan. This makes Belle II the third-largest German particle physics project, behind the ATLAS and CMS experiments at the LHC particle accelerator at CERN.

The great diversity of the Belle II collaboration is a major strength of the project. The collaboration and the project management are committed to fostering an inclusive environment that allows all participants to reach their full potential.

Any form of discrimination, xenophobia, or violence is condemned by the Collaborative, regardless of whether it is based on race, gender, sexuality, or any other reason. The Belle II Collaborative's bylaws include a Code of Conduct that sets forth these principles of diversity and inclusion and is absolutely binding on all Belle II employees.