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arXiv 0706.2200hep-ex
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在CDF上寻找H-> WW(*)和其它Diboson末态

Searching for H->WW(*) and Other Diboson Final States at CDF

Shih-Chieh Hsu

摘要:

我们报道了在两个带电轻子和两个中微子末态中寻找衰变到WW(*)的标准模型(SM)Higgs产生和连续区ZZ产生。这些数据是用费米实验室Tevatron的CDF II探测器收集的,对应的积分亮度为1.1 ^fb-1。为了分离对最终状态有贡献的过程,使用前导阶微分截面计算的事件概率被用来构造似然比判别式。观察到的(预期中位数)95% C.L.在160 GeV/c^2质量假设下,sigma(H->WW^(*))的上限为1.3(1.8)pb,相当于在次-次-领先对数水平(NNLL)计算下SM预测值的3.4(4.8)倍。观察到的ZZ信号的显著性为1.9 σ,95% C.L.上限为3.4 pb,这与1.4+/-0.1 pb的次前导阶(NLO)计算值一致。

英文摘要:

We report searches for standard model (SM) Higgs production decaying to WW(*) and continuum ZZ production in the two charged lepton and two neutrino final states. The data were collected with the CDF II detector at the Fermilab Tevatron and correspond to an integrated luminosity of 1.1^fb-1. In order to separate the processes contributing to the final state, event probabilities calculated using the leading order differential cross-sections were used to construct a likelihood ratio discriminant. The observed (median expected) 95% C.L. upper limit for sigma(H->WW^(*)) with 160 GeV/c^2 mass hypothesis is 1.3 (1.8) pb which corresponds to 3.4 (4.8) times the SM prediction at next-to-next-to-leading logarithmic level (NNLL) calculation. The significance of the observed ZZ signal is 1.9 sigma and the 95% C.L. upper limit is 3.4 pb which is consistent with the next-to-leading order (NLO) calculation of 1.4+/-0.1 pb.

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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