Search for $D^0->{\ell }^{+}{\ell }^{-}$ decays and for CP violation in $D_{(s)}^{+}\to K_S^0{\pi }^{+}$ and $D_{(s)}^{+}\to K_S^0{K}^{+}$ at BELLE

Abstract

We are reporting on a search for flavour-changing neutral current decays $D^0\to {\mu }^{+}{\mu }^{-}$ and $D^0\to e^{+}{e}^{-}$, and for lepton-flavour violating decays $D^0\to e^{\pm }{\mu }^{\mp }$, the measurement of $D_{(s)}^{+}\to K_S^0{\pi }^{+}$ and $D_{(s)}^{+}\to K_S^0{K}^{+}$ branching fractions, and the search for CP violation in $D_{(s)}^{+}\to K_S^0{\pi }^{+}$ and $D_{(s)}^{+}\to K_S^0{K}^{+}$ decays. The analyses are based on 600 fb${}^{-1}$ to 700 fb${}^{-1}$ of data collected in $e^{+}{e}^{-}$ collisions at the centre-of-mass (CM) energy of the ${\rm Y}(4S)$ resonance and 60 MeV below by the Belle detector at the KEKB collider.

arXiv comment4 pages, 3 figures