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arXiv 0809.3781hep-ex
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CDF全球寻找2.0/fb新物理

Global Search for New Physics with 2.0/fb at CDF

CDF Collaboration, T. Aaltonen

摘要:

在费米实验室Tevatron运行II中收集的数据被搜索,以寻找新的电弱尺度物理学的迹象。CDF的数据不是集中在特定的新物理情景上,而是分析与标准模型预测的差异。一个模型独立的方法(Vista)考虑了数据的总体特征,并对新的大截面物理敏感。另外两种算法提供了对新物理学的进一步敏感性:Bump Hunter搜索不变质量分布,以寻找可能表明共振产生新粒子的“凸点”;以及Sleuth程序扫描在大的总横向动量下的数据过剩。在sqrt(s)=1.96 TeV的ppbar碰撞中,这种对2.0/fb新物理的全球搜索没有显示出超出标准模型的物理迹象。

英文摘要:

Data collected in Run II of the Fermilab Tevatron are searched for indications of new electroweak-scale physics. Rather than focusing on particular new physics scenarios, CDF data are analyzed for discrepancies with the standard model prediction. A model-independent approach (Vista) considers gross features of the data, and is sensitive to new large cross-section physics. Further sensitivity to new physics is provided by two additional algorithms: a Bump Hunter searches invariant mass distributions for "bumps" that could indicate resonant production of new particles; and the Sleuth procedure scans for data excesses at large summed transverse momentum. This combined global search for new physics in 2.0/fb of ppbar collisions at sqrt(s)=1.96 TeV reveals no indication of physics beyond the standard model.

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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