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

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dc.creatorWu, Yue-Liang
dc.creatorZhou, Yu-Feng
dc.creatorZhuang, Ci
dc.date2006-06-02
dc.date.accessioned2026-07-07T07:13:23Z
dc.date.available2026-07-07T07:13:23Z
dc.descriptionA model-independent analytical analysis for charmless B decays is presented. It is demonstrated that the CP-averaging branching ratio difference $ΔR = R_c - R_n$ in $B\to πK$ decays with $R_c = 2Br(π^0K^-)/Br(π^-\bar{K}^0)$ and $R_n =Br(π^+K^-)/2Br(π^0\bar{K}^0)$ 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 $ΔR^{exp}/ΔR^{SM} > 9.0\pm 5.0$ 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 $|C'/T'|\sim 2$, large CP violations ($A_{CP}(π^0\bar{K}^0)\sim 0.69$ and $A_{CP}(π^0\bar{K}^-)\sim 0.56$), 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 $B\to ππ, πK$ decays may provide a window for probing new physics and testing the isospin and SU(3) symmetries.
dc.description15 pages, no figures, RevTex
dc.identifierhttps://arxiv.org/abs/hep-ph/0606035
dc.identifierhttp://arxiv.org/abs/hep-ph/0606035
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/112442
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSignal of New Physics and Test of Isospin-SU(3) Relations and CP Violation in Charmless B Decays
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