On the Universality of CP Violation in Delta F = 1 Processes

Abstract

We show that new physics which breaks the left-handed SU(3)_Q quark flavor symmetry induces contributions to CP violation in Delta F = 1 couplings which are approximately universal, in that they are not affected by flavor rotations between the up and the down mass bases. (Only the short distance contributions are universal, while observables are also affected by hadronic matrix elements.) Therefore, such flavor violation cannot be aligned, and is constrained by the strongest bound from either the up or the down sectors. We use this result to show that the bound from eps'/eps prohibits an SU(3)_Q breaking explanation of the recent LHCb evidence for CP violation in D meson decays. Another consequence of this universality is that supersymmetric alignment models with a moderate mediation scale are consistent with the data, and are harder to probe via CP violating observables. With current constraints, therefore, squarks need not be degenerate. However, future improvements in the measurement of CP violation in D-Dbar mixing will start to probe alignment models.

10 pages, 2 figures. Clarifications and references added

References in corpus (18)

• General Minimal Flavor Violation
• Flavor from Minimal Flavor Violation & a Viable Randall-Sundrum Model
• The Decay B --> K l^+ l^- at Low Hadronic Recoil and Model-Independent Delta B = 1 Constraints
• Logarithmically Enhanced Corrections to the Decay Rate and Forward Backward Asymmetry in anti-B --> X(s) l+ l-
• Combining K-\bar K mixing and D-\bar D mixing to constrain the flavor structure of new physics
• KL to pi0 e+ e- and KL to pi0 mu+ mu- : A binary star on the stage of flavor physics
• New physics reach of the decay mode $\bar{B}\to {\bar{K}}^{\ast 0}{\ell }^{+}{\ell }^{-}$
• Heavy Flavor Simplified Models at the LHC
• Deciphering top flavor violation at the LHC with B factories
• $D\to \pi ,l\nu$ Semileptonic Decays, $|V_{cd}|$ and 2${}^{nd}$ Row Unitarity from Lattice QCD
• A Non Standard Supersymmetric Spectrum
• Updated constraints on new physics in rare charm decays
• Search for the Rare Decay B->K nu nubar
• Study of ATLAS sensitivity to FCNC top decays
• Precise predictions for B -> Xs l+ l- in the large q^2 region
• Signatures of NP models in top FCNC decay t --> c(u) l+ l-
• Covariant Description of Flavor Conversion in the LHC Era
• Covariant Description of Flavor Violation at the LHC

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