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arXiv 0810.2328hep-ex
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在CLEO上测量D和Ds衰变常数

Measurements of D and Ds decay constants at CLEO

Liming Zhang

摘要:

使用在3370 MeV和4170 MeV收集的CLEO数据,我们确定fD =(205.8 +- 8.5 +- 2.5)MeV和fD的临时初步值=(267.9 +- 8.2 +- 3.9)MeV,其中两个结果都进行了辐射校正。对于D+,它们与最近最精确的非猝灭格点QCD计算结果一致,但对于Ds,它们不一致。几个后果进行了讨论。

英文摘要:

Using CLEO data collected at 3370 MeV and 4170 MeV, we determine fD = (205.8 +- 8.5 +- 2.5) MeV and an interim preliminary value of fDs = (267.9 +- 8.2 +- 3.9) MeV, where both results are radiatively corrected. They agree with the recent most precise unquenched Lattice-QCD calculation for the D+, but do not for the Ds. Several consequences are discussed.

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