Belle II Technical Design Report

Understand

The Belle detector at the KEKB electron-positron collider has collected almost 1 billion Y(4S) events in its decade of operation.

• Super-KEKB, an upgrade of KEKB is under construction, to increase the luminosity by two orders of magnitude during a three-year shutdown, with an ultimate goal of 8E35 /cm^2 /s luminosity.
• To exploit the increased luminosity, an upgrade of the Belle detector has been proposed.
• A new international collaboration Belle-II, is being formed.