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arXiv 0709.2264hep-ex
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用CDF探测器在顶夸克样品中寻找新物理信号

Looking for signals of New Physics in the Top quark samples with the CDF detector

Susana Cabrera

摘要:

在发现顶夸克12年后,CDF探测器收集到了大量的积分亮度高达1-1.7 fb^-1的tt-bar事件样本,我们可以在这些样本中探索我们对标准模型顶夸克的认识。本文将重点介绍那些致力于在顶夸克产生中寻找新物理的分析结果:测量顶夸克对产生机制的相对分数,寻找衰变为tt-棒对的大质量共振态以及作为标准模型顶夸克衰变的重类顶夸克。除了产生顶夸克衰变外,它也是一种有趣的探索,通过测量衰变t-->W(-->l+v_l)b中W玻色子螺旋度分数的可能异常值,寻找变味中性流衰变t-->Zq,或通过测试顶夸克荷为+2/3或-4/3,来发现超越标准模型的物理学。

英文摘要:

Twelve years after the discovery of the Top quark, the CDF detector has collected large samples of tt-bar events with integrated luminosities up to 1-1.7 fb^-1, where we are able to probe our knowledge of the Standard Model Top quark. This article will focuss on those analysis results dedicated to find new physics in the Top quark production: measurement of relative fractions of Top pair production mechanisms, searches for a massive resonant state decaying to tt-bar pairs as well as a heavy Top-like quark decaying as the Standard Model Top quark. Besides its production, the Top quark decay is also an interesting probe to find Physics Beyond the Standard Model by measuring possibly anomalous values of the helicity fractions of the W boson in the decay t-->W(-->l+v_l)b by searching for flavour changing neutral current decays t-->Zq or by testing the Top quark charge to be +2/3 or -4/3.

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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