Weak phase γ from the ratio ofB→Kπrates
نویسندگان
چکیده
منابع مشابه
Weak Phase Γ from Ratio of B →
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,...
متن کاملWeak Phase Γ from Color - Allowed B → Dk Rates
The ratios of partial rates for charged B decays to the recently observed DK mode and to the two DCPK final states (CP = ±) are shown to constrain the weak phase γ ≡ Arg(V ∗ ub). The smaller color-suppressed rate, providing further information about the phase, can be determined from these rates alone. Present estimates suggest that, while the first constraints can already be obtained in a high ...
متن کاملMeson exchange in the weak decay of Λ hypernuclei and the Γ n / Γ p ratio
We take an approach to the Λ non-mesonic weak decay in nuclei based on the exchange of mesons. The one pion and one kaon exchange are considered, together with the exchange of two pions, either correlated, leading to an important scalar-isoscalar exchange (σ-like exchange), or uncorrelated (box diagrams). Constraints of chiral dynamics are used to generate these exchanges. A drastic reduction o...
متن کاملDetermining the Weak Phase γ in the Presence of Rescattering
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) ...
متن کاملDiscrete Ambiguities in the Measurement of the Weak Phase γ
Several methods have been devised for measuring the phase γ of the Cabibbo-Kobayashi-Maskawa [1] unitarity triangle, using decays of the type B → DK. It is shown that these and other direct CP-violation measurements suffer from discrete ambiguity which is at least 8-fold. Combining two measurement methods helps reduce the ambiguity and the experimental error. The measurement sensitivity and new...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 1998
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.57.6843