Space-like Penguin effects in
نویسندگان
چکیده
منابع مشابه
Effects of the Space-like Penguin Diagrams on CP Asymmetries in Exclusive B Decays
The space-like penguin contributions were ignored on little ground in many previous studies of nonleptonic B transitions and CP violation. Taking the penguin-dominated channels B− u → K̄0π− and B− u → K0K− for example, we illustrate the non-negligible effects of the space-like penguin diagrams on CP asymmetries. Some qualitative remarks are given on the gluonic penguin picture and direct CP viol...
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We study umbilic (space-like) submanifolds of pseudo-Riemannian space forms, then define totally semi-umbilic space-like submanifold of pseudo Euclidean space and relate this notion to umbilicity. Finally we give characterization of total semi-umbilicity for space-like submanifolds contained in pseudo sphere or pseudo hyperbolic space or the light cone.A pseudo-Riemannian submanifold M in (a...
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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 can be considered as almost model independent. It has recently been argued that rescattering effects, s...
متن کاملPenguin Topologies , Rescattering Effects and Penguin Hunting with B u , d → KK and B ± → π ± K
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...
متن کاملumbilicity of (space-like) submanifolds of pseudo-riemannian space forms
we study umbilic (space-like) submanifolds of pseudo-riemannian space forms, then define totally semi-umbilic space-like submanifold of pseudo euclidean space and relate this notion to umbilicity. finally we give characterization of total semi-umbilicity for space-like submanifolds contained in pseudo sphere or pseudo hyperbolic space or the light cone.a pseudo-riemannian submanifold m in (a ps...
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 1998
ISSN: 1434-6044
DOI: 10.1007/s100520050313