The SuperBelle Project Original Research Article

To search for deviations from the Standard Model in flavour physics and to distinguish between different new physics models by a close examination of the flavour structure, we plan a major upgrade of the KEKB electron-positron collider (SuperKEKB). The design luminosity of 8×1035 cm−2s−1, which is 50 times larger than the peak luminosity achieved with KEKB, will allow studies of rare processes in B, D and tau decays to be performed with unprecedented precision. The current Belle detector will be upgraded to take full advantage of the high luminosity of SuperKEKB. Despite substantial beam backgrounds, the SuperBelle detector should, at the end, perform at least as well as the present Belle detector.