Speaker
Michel Bertemes
(Austrian Academy of Sciences (AT))
Description
The Belle and Belle$~$II experiments have collected a $1.4~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. These samples contain a large number of $e^+e^-\to c\bar{c}$ events that produce charmed mesons. We present measurements of charm-mixing parameters from flavour-tagged $D^0\to K^0_{\rm S}\pi^+\pi^-$ decays. Direct $C\!P$ violation is searched for in $D^0\to K^0_{\rm S}K^0_{\rm S}$ decays, $D^0\to \pi^0\pi^0$ decays and several modes where the $D$ meson decays to a four-body final state. For the four-body decays, asymmetries in the distributions of triple and quadruple moments probe for $C\!P$ violation.
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Authors
Michel Bertemes
(Austrian Academy of Sciences (AT))
Sven Vahsen
(University of Hawaii (US))
