Rare Charm Decays in the Standard Model and Beyond

Details Rare Charm Decays in the Standard Model and Beyond Rare Charm Decays in the Standard Model and Beyond

2001-12-18

arxiv.org/abs/hep-ph/0112235v2

Phys.Rev.D66:014009,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

45 pages, typos fixed, discussions added

Scientific paper

10.1103/PhysRevD.66.014009

We perform a comprehensive study of a number of rare charm decays, incorporating the first evaluation of the QCD corrections to the short distance contributions, as well as examining the long range effects. For processes mediated by the $c\to u\ell^+\ell^-$ transitions, we show that sensitivity to short distance physics exists in kinematic regions away from the vector meson resonances that dominate the total rate. In particular, we find that $D\to\pi\ell^+\ell^-$ and $D\to\rho\ell^+\ell^-$ are sensitive to non-universal soft-breaking effects in the Minimal Supersymmetric Standard Model with R-parity conservation. We separately study the sensitivity of these modes to R-parity violating effects and derive new bounds on R-parity violating couplings. We also obtain predictions for these decays within extensions of the Standard Model, including extensions of the Higgs, gauge and fermion sectors, as well as models of dynamical electroweak symmetry breaking.

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