$c\to u γ$ in Cabibbo suppressed D meson radiative weak decays

Details $c\to u γ$ in Cabibbo suppressed D meson radiative weak decays $c\to u γ$ in Cabibbo suppressed D meson radiative weak decays

1995-09-22

arxiv.org/abs/hep-ph/9509361v1

Phys.Rev. D54 (1996) 5883-5886

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, latex, 2 uuencoded Postscript figures in a separate file

Scientific paper

10.1103/PhysRevD.54.5883

We investigate Cabibbo suppressed $D^{0}$, $D^{+}$ and $D^{+}_{s}$ radiative weak decays in order to find the best mode to test $c\to u \gamma$ decay. Combining heavy quark effective theory and the chiral Lagrangian approach we determine the decay widths. We calculate $\Gamma(D^{0}\to \rho^{0}/\omega\gamma)/ \Gamma(D^{0}\to {\bar K}^{*0} \gamma)$ previously proposed to search for possible New Physics. However, we notice that there are large, unknown, corrections within the Standard Model. We propose a better alternative, the ratio $\Gamma(D_{s}^{+}\to K^{*+} \gamma)/ \Gamma(D_{s}^{+}\to \rho^{+} \gamma)$, and show that it is less sensitive to the Standard Model.

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