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arXiv 0911.4449hep-ex
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用CDF II的轻子+喷流末态测量WW + WZ产生截面

Measurement of the WW+WZ Production Cross Section Using the Lepton+Jets Final State at CDF II

The CDF Collaboration

摘要:

我们报告两个互补的测量结果的WW+WZ截面的最终状态组成的电子或μ子,丢失的横向能量,和射流,使用p \bar{p}碰撞数据在sqrt{s} = 1.96 TeV的CDF II探测器收集。第一种方法使用dijet不变质量分布,而第二种更敏感的方法使用矩阵元素计算。第二种方法的结果具有5.4 sigma的信号显著性,并且是使用该特征的WW+WZ生产的第一次观察。结合结果得到sigma_{WW+WZ} = 16.0 +/- 3.3 pb,与标准模型预测一致。

英文摘要:

We report two complementary measurements of the WW+WZ cross section in the final state consisting of an electron or muon, missing transverse energy, and jets, performed using p\bar{p} collision data at sqrt{s} = 1.96 TeV collected by the CDF II detector. The first method uses the dijet invariant mass distribution while the second more sensitive method uses matrix-element calculations. The result from the second method has a signal significance of 5.4 sigma and is the first observation of WW+WZ production using this signature. Combining the results gives sigma_{WW+WZ} = 16.0 +/- 3.3 pb, in agreement with the standard model prediction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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