REDUCING PENGUIN POLLUTION
نویسندگان
چکیده
منابع مشابه
Penguin Pollution in Β and Β S
The mixing-induced CP asymmetries in Bd → J/ψKS and Bs → J/ψφ are essential to detect or constrain new physics in the Bd−Bd and Bs−Bs mixing amplitudes, respectively. To this end one must control the penguin contributions to the decay amplitudes, which affect the extraction of fundamental CP phases from the measured CP asymmetries. Although the “penguin pollution” is doubly Cabibbo-suppressed, ...
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متن کاملImproving Bounds on Penguin Pollution in B → ππ
In the presence of penguin contributions, the indirect CP asymmetry in B(t) → ππ measures sin(2α + 2θ), where 2θ parametrizes the size of the penguin “pollution.” We present a new upper bound on |2θ|, involving also the measurement of B → ππ, along with an upper bound on or a measurement of BR(B → ππ)+BR(B0 → ππ). The new bound is stronger than those previously discussed in the literature. Inde...
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We use the perturbative QCD methods of Lepage and Brodsky to calculate the rate for ¯ B s → ρK S , with an eye toward the CP violating unitarity triangle angle γ. We show that , although the penguins are large, there are regions of the allowed parameter space of the Cabibbo-Kobayashi-Maskawa mixing matrix wherein γ is measurable in the sense that penguins change the value of sin(2γ) one would e...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics A
سال: 2013
ISSN: 0217-751X,1793-656X
DOI: 10.1142/s0217751x13500632