Electroweak penguin effects in charmless B �,0 ? PP and PV decays
نویسندگان
چکیده
منابع مشابه
THE b → s PENGUIN AMPLITUDE IN CHARMLESS B → PP DECAYS
The b → s penguin amplitude affects a number of B meson decays to two pseudoscalar (P ) mesons in which potential anomalies are being watched carefully, though none has yet reached a statistically compelling level. These include (a) a rate for B → Kπ which is slightly enhanced with respect to expectations; (b) a timedependent CP asymmetry parameter S for B → Kπ which is low in comparison with t...
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In this research we work with the effective Hamiltonian and the quark model. We investigate the decay rates of matter-antimatter of quark. We describe the effective Hamiltonian theory and apply this theory to the calculation of current-current ( ), QCD penguin ( ), magnetic dipole ( ) and electroweak penguin ( ) decay rates. The gluonic penguin structure of hadronic decays is studied thro...
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This research, works with the effective Hamiltonian and the quark model. Using, the decay rates of matter-antimatter of b quark was investigated. We described the effective Hamiltonian theory which was applied to the calculation of current-current (Q1,2), QCD penguin (Q3,…,6), magnetic dipole (Q8) and electroweak penguin (Q7,…,10) decay rates. The gluonic penguin structure of hadronic decays ...
متن کاملElectroweak Penguin Amplitudes and Constraints on Γ in Charmless B
Electroweak penguin (EWP) amplitudes are studied model-independently in B meson decays to charmless final states consisting of a vector meson (V ) and a pseudoscalar meson (P ). A set of SU(3) relations is derived between EWP contributions and tree amplitudes, in the approximation of retaining only the dominant EWP operators Q9 and Q10 . Two applications are described for constraining the weak ...
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In the study of two-body charmlessB decays as a mean of looking for direct CP-violation and measuring the CKM mixing parameters in the Standard Model, the short-distance penguin contribution with its absorptive part generated by charm quark loop seems capable of producing sufficient B → Kπ decays rates, as obtained in factorization and QCD-improved factorization models. However there are also l...
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ژورنال
عنوان ژورنال: Zeitschrift f�r Physik C Particles and Fields
سال: 1997
ISSN: 0170-9739,1431-5858
DOI: 10.1007/s002880050441