B meson physics on Υ (4s)

The charmless non-leptonic decays of the B meson are expected to provide a sensitive test of the standard model. In particular, the processes involving three s-quarks in the final state are rare decay modes because these dominant processes are loop-induced b→sg transitions, or so-called penguin diagrams. One typical mode of these rare decays is the B→Kφ process. The charmless decays through the penguin process have another source of CP violation, so new physics such as the fourth generation, SUSY and the three Higgs doublets models may play an important role in the CP violation of these decays. An investigation is made here of the contribution of the fourth generation to the CP violation in the B→Kφ decay. An analysis is made of the CP violating asymmetries of the Kφ decay of the charged B mesons and the neutral B mesons on Υ (4s), which is advantageous to observation of the effect of new physics. The branching ratio of B→Kφ is 1 x 10-5 and consequently, a 3σ effect would require at least 1010 Υ (4s)'s if the asymmetry is of an order of 1%, but 107-108 Υ (4s)'s if it is ±15%. Since 106-107 Υ (4s)'s are attainable at CESR(Υ 4s), it is expected that the fourth generation effect will be observed in the Bu±→K±φ, Bd0→Ksφ and Bd0→Ksφ processes on Υ (4s). (N.K.)