摘要
By analyzing 2.93 fb~(~(-1)) data collected at the center-of-mass energy s~(1/2)=3.773 GeV with the BESⅢdetector,we measure the absolute branching fraction of the semileptonic decay D~+→K~0e+v_e to be B(D~+→K~0e~+v_e) =(8.59 ±0.14 ±0.21)%using K~0→K_S~0→π~0π~0,where the first uncertainty is statistical and the second systematic.Our result is consistent with previous measurements within uncertainties..
By analyzing 2.93 fb~(~(-1)) data collected at the center-of-mass energy s~(1/2)=3.773 GeV with the BESⅢdetector,we measure the absolute branching fraction of the semileptonic decay D~+→K~0e+v_e to be B(D~+→K~0e~+v_e) =(8.59 ±0.14 ±0.21)%using K~0→K_S~0→π~0π~0,where the first uncertainty is statistical and the second systematic.Our result is consistent with previous measurements within uncertainties..
引文
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