We report new measurements of the cross sections for the production of DD final states at theψ(3770)*** data sample consists of an integrated luminosity of 2.93 fb^(-1)of e~+e^-annihilation data produced by the ...
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We report new measurements of the cross sections for the production of DD final states at theψ(3770)*** data sample consists of an integrated luminosity of 2.93 fb^(-1)of e~+e^-annihilation data produced by the BEPCⅡ collider and collected and analyzed with the BESⅢ *** exclusively reconstruct three D^0and six D~+hadronic decay modes and use the ratio of the yield of fully reconstructed DD events(“double tags”)to the yield of all reconstructed D or D mesons(“single tags”)to determine the number of D^0 D^0and D~+D^-events,benefiting from the cancellation of many systematic *** these yields with an independent determination of the integrated luminosity of the data sample,we find the cross sections to beσ(e~+e^-→D^0D^0)=(3.615±0.010±0.038)nb andσ(e~+e^-→D~+D^-)=(2.830±0.011±0.026)nb,where the uncertainties are statistical and systematic,respectively.
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