2009/05/21 by Seungwon Baek, Cheng-Wei Chiang, Michael Gronau +2
Mathematics · Physics and Astronomy · #Algorithm #Combinatorics #Mathematics #Neutrino Physics Research #Order (exchange) #Particle physics theoretical and experimental studies #Philosophy #Physics #Quantum Chromodynamics and Particle Interactions #Scroll #Theology #Tree (set theory) #hep-ph
paper · pdf · doi:10.1016/j.physletb.2009.06.018
published as Phys.Lett.B678:97-100,2009 · 10 pages, no figures. Submitted to Physics Letters B. Slight clarification added
arxiv created 2009/05/21 · openalex publication_date 2009/06/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A recent analysis of B → πK decays concludes that present data do not clearly indicate whether (i) the standard model (or ΔI=0 new physics) is sufficient, or (ii) ΔI=1 new physics is needed. We show that these two possibilities can be distinguished by whether a sum rule relating the CP asymmetries of the four B → πK decays is valid. If case (i) is favored, the sum rule holds, and one predicts ACP(π0 K0) = -0.15, while in case (ii) fits to new physics involving large values of a color-suppressed tree amplitude entail ACP(π0 K0) = -0.03. The current experimental average ACP(π0 K0) = -0.01 ± 0.10 must be measured a factor of at least three times more precisely in order to distinguish between the two cases.