Signal of New Physics and Test of Isospin-SU(3) Relations and CP Violation in Charmless B Decays

الأصل · EN

A model-independent analytical analysis for charmless B decays is presented. It is demonstrated that the CP-averaging branching ratio difference ΔR = Rc - Rₙ in B→ πK decays with Rc = 2Br(π⁰K-)/Br(π-K⁰) and Rₙ =Br(π+K-)/2Br(π⁰K⁰) defines a sensitive quantity for probing new physics as ΔR is dominated by the second order of electroweak penguin contributions. A large discrepancy between experimental data and standard model (SM) prediction ΔRexp/ΔRSM > 9.0± 5.0 strongly indicates a signal of new physics in the electroweak penguin sector. Within the SM, the current πK data favor a very large color-suppressed tree amplitude |C'/T'| 2, large CP violations (ACP(π⁰K⁰) 0.69 and ACP(π⁰K-) 0.56), which is connected to ΔR and be solved simultaneously with extra electroweak penguin contributions. More accurate measurements on the ratio difference ΔR and CP violation in B→ ππ, πK decays may provide a window for probing new physics and testing the isospin and SU(3) symmetries.