Search for D^0-\bar{D^0} mixing using semileptonic decays at Belle

K. Abe

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arXiv · hep-ex/0408112

Search for D^0-\bar{D^0} mixing using semileptonic decays at Belle

K. Abe

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Abstract

A search for mixing in the neutral D meson system was performed using semileptonic D^0 -> K- e+ nu decays. The flavor of neutral D mesons at production was tagged by the charge of the slow pion from the decay D*+ -> D^0 π+. The measurement was performed using 140 fb^-1 of data recorded by the Belle detector. The yield of right and wrong sign decays arising from un-mixed and mixed events, respectively, was determined by a fit to kinematic observables. From the number of signal events we derive an upper limit for the time-integrated mixing rate r_D < 1.4 x 10^-3 at 90% C.L.

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K. Abe. 2004-08-23. Search for D^0-\bar{D^0} mixing using semileptonic decays at Belle. https://arxiv.org/abs/hep-ex/0408112

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