Determining weak phase γ and probing new physics in b→s transitions from B→η(’)K
نویسندگان
چکیده
منابع مشابه
THE ROLE OF Bs → Kπ IN DETERMINING THE WEAK PHASE γ 1
The decay rates for B → Kπ, B → Kπ, and the charge-conjugate processes were found to provide information on the weak phase γ ≡ Arg(V ∗ ub) when the ratio r of weak tree and penguin amplitudes was taken from data on B → ππ or semileptonic B → π decays. We show here that the rates for Bs → Kπ and B̄s → Kπ can provide the necessary information on r, and estimate the statistical accuracy of forthcom...
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We suggest a new technique to determine the CKM phase γ without neglecting the (soft) final state rescattering effects. We use (time integrated) B meson decay rates to π's and K's. A set of 5 ∆S = 0 (or 1 ∆S = 0 and 4 ∆S = 1) decay rates is used to compute the strong phases and magnitudes of the tree level and penguin contributions as functions of γ. These are used to predict a ∆S = 1 (∆S = 0) ...
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An enhanced electroweak penguin amplitude due to the presence of unknown new physics can explain the discrepancies found between theory and experiment in the B → πK decays, in particular in ACP(B − → πK)−ACP(B̄ 0 → πK), but the current precision of the theoretical and experimental results does not allow to draw a firm conclusion. We argue that the B̄s → φρ 0 and B̄s → φπ 0 decays offer an addition...
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The ratio of partial decay rates for charged and neutral B mesons to Kπ final states provides information on the weak phase γ ≡ Arg(V ∗ ub) when augmented with information on the CP-violating asymmetry in the Kπ mode. The statistical requirements for a useful determination of γ and certain systematic uncertainties are examined in the light of present information about the decays B → Kπ, B → Kπ,...
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With U-spin symmetry, b → s and b → d penguin decays could be a subtle probe of CP violating new physics contributions. We show that, for B → PP (P stands for a pseudoscalar meson), the U-spin relation is expected to be violated for only one decay pair by assuming that new physics affects only b → s transition processes. We also very shortly discuss the polarizations of two types of U-spin pair...
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2006
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s2006-02509-7