The diquark model: New Physics effects for charm and kaon decays

Abstract

Motivated by diquark exchange, we construct a class of extensions of the standard model. These models can generate large CP conserving and CP violating contributions to the doubly Cabbibo suppressed decays D^0\to K^+π^- without affecting D^0-\overline{D^0} mixing, contrary to what is usually believed in the literature. We find an interesting specific realization of these models, which has the LR chiral structure and can induce novel density \times density operators. It is new for non-leptonic kaon decays, and particularly, may provide a possible solution to the ΔI=1/2 rule and direct CP violation, without inducing large flavour changing neutral currents.

LaTeX, 12 pages and 2 eps figures. Minor changes, paper accepted by Physics Letters B

References in corpus (2)

• A new limit on the permanent electric dipole moment of ^{199}Hg
• A Study of the Decay D0->K+pi-

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• Non-leptonic decays of Charmed mesons into two Pseudoscalars
• Resonant Production of Scalar Diquarks at the Next Generation Electron-Positron Colliders
• Pursuit of new physics within the ${\Lambda }_c\to \Delta K$ decays