Improved search for D^0 mixing using semileptonic decays at Belle

BELLE Collaboration: U. Bitenc; et al

Improved search for D^0 mixing using semileptonic decays at Belle

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arxiv 0802.2952 v2 pith:URZJHN2R submitted 2008-02-20 hep-ex

BELLE Collaboration: U. Bitenc , et al This is my paper

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keywords decaysmixingbelleneutralperformedratesearchsemileptonic

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A search for mixing in the neutral D meson system has been performed using semileptonic D0 -> K(*)- e+ \nu and D0 -> K(*)- \mu+ \nu decays. Neutral D mesons from D*+ -> D0 \pi_s^+ decays are used and the flavor at production is tagged by the charge of the slow pion. The measurement is performed using 492 fb^-1 of data recorded by the Belle detector. From the yield of right-sign and wrong-sign decays arising from non-mixed and mixed events, respectively, we measure the ratio of the time-integrated mixing rate to the unmixed rate to be R_M = (1.3 +- 2.2 +- 2.0) x 10^-4. This corresponds to an upper limit of R_M < 6.1 x 10^-4 at the 90% C.L.

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hep-ph 2025-06 unverdicted novelty 1.0 of 10

A review chapter summarizing the theoretical framework and experimental status of charm hadron lifetimes, D0 mixing, CP violation, and rare decays.

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