A Possible Arena for Searching New Physics - the $Γ(D^0 \to ρ^0 γ)/Γ(D^0 \to ωγ)$ Ratio

Details A Possible Arena for Searching New Physics - the $Γ(D^0 \to ρ^0 γ)/Γ(D^0 \to ωγ)$ Ratio A Possible Arena for Searching New Physics - the $Γ(D^0 \to ρ^0 γ)/Γ(D^0 \to ωγ)$ Ratio

2000-06-06

arxiv.org/abs/hep-ph/0006054v1

Phys.Lett.B487:81-86,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 1 figure included

Scientific paper

10.1016/S0370-2693(00)00731-0

We propose to investigate flavour changing neutral currents in the $c \to u \gamma$ transition through the measurement of the difference between $\Gamma (D^0 \to \rho^0 \gamma)$ and $\Gamma (D^0 \to \omega \gamma)$. This is based on the observation that $D^0 \to (d \bar d) \gamma$ is due to long distance physics while $D^0 \to (u \bar u) \gamma$ arises from the $c \to u \gamma$ transition. The effect of $\rho - \omega$ mixing is included. A difference in the decay widths of more than about 30% would be indicative of new physics.

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