Penguin Topologies, Rescattering Eeects And
نویسندگان
چکیده
In the recent literature, constraints on the CKM angle arising from the branching ratios for B ! K and B d ! K decays received a lot of attention. An important theoretical limitation of the accuracy of these bounds is due to rescat-tering eeects, such as B + ! f 0 K + g ! + K 0. We point out that these processes are related to penguin topologies with internal up quark exchanges and derive SU (2) isospin relations among the B + ! + K 0 and B 0 d ! ? K + decay amplitudes by deening \tree" and \penguin" amplitudes in a proper way, allowing the derivation of generalized bounds on the CKM angle. We propose strategies to obtain insights into the dynamics of penguin processes with the help of the decays B u;d ! KK and B ! K, derive a relation among the direct CP-violating asymmetries arising in these modes, and emphasize that rescattering eeects can be included in the generalized bounds on completely this way. Moreover, we have a brief look at the impact of new physics.
منابع مشابه
Penguin Topologies , Rescattering Effects and Penguin Hunting with B u , d → KK and B ± → π ±
In the recent literature, bounds on the CKM angle γ arising from combined branching ratios for Bd → πK and B → πK decays received a lot of attention. If the ratio R of these branching ratios is found experimentally to be smaller than 1 – present CLEO results give R = 0.65± 0.40 – these bounds can be considered as almost model independent. It has recently been argued that rescattering effects, s...
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In the recent literature, bounds on the CKM angle γ arising from combined branching ratios for Bd → πK and B → πK decays received a lot of attention. If the ratio R of these branching ratios is found experimentally to be smaller than 1 – present CLEO results give R = 0.65 ± 0.40 – these bounds are free of hadronic uncertainties at the level of 1%. It has recently been argued that rescattering e...
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