The DØ detector has been undergoing a major upgrade in preparation for the high-luminosity run at the Tevatron. This document reviews the components of the upgrade with an emphasis on the new B physics capabilities. Projections for the observability of the CP violation are made based on the upgrade simulation. It is shown that measurement of sin 2β can be achieved at DØ with uncertainty below 0.1 for an integrated luminosity of 2 fb −1 .

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