Search for D0−D¯0 mixing using semileptonic decays at Belle

Le résumé fourni par la source

A search for mixing in the neutral $D$ meson system has been performed using semileptonic ${D}^{0}\ensuremath{\rightarrow}{K}^{(*)\ensuremath{-}}{e}^{+}\ensuremath{\nu}$ decays. Neutral $D$ mesons from ${D}^{*+}\ensuremath{\rightarrow}{D}^{0}{\ensuremath{\pi}}^{+}$ decays are used; the flavor at production is tagged by the charge of the slow pion. The measurement is performed using $253\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data recorded by the Belle detector. From the yield of right-sign and wrong-sign decays arising from nonmixed and mixed events, respectively, we estimate the upper limit of the time-integrated mixing rate to be ${r}_{D}<1.0\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$ at $90%$ C.L.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.