SuperB: NEXT-GENERATION e+e − B-FACTORY COLLIDER ∗

The SuperB international team continues to optimize the design of an electron-positron collider, which will allow the enhanced study of the origins of flavor physics. The project combines the best features of a linear collider (high single-collision luminosity) and a storage-ring collider (high rep-etition rate), bringing together all accelerator physics as-pects to make a very high luminosity of 1036 cm−2 sec−1. This asymmetric-energy collider with a polarized electron beam will produce hundreds of millions of B-mesons at the Υ(4S) resonance. The present design is based on ex-tremely low emittance beams colliding at a large Piwin-ski angle to allow very low βy without the need for ultra short bunches. Use of crab-waist sextupoles will enhance the luminosity, suppressing dangerous resonances and al-lowing for a higher beam-beam parameter. The project has flexible beam parameters, improved dynamic aperture, and spin-rotators in the Low Energy Ring for longitudinal po-larization of the electron beam at the Interaction Point. Op-timized for best colliding-beam performance, the facility may also provide high-brightness photon beams for syn-chrotron radiation applications