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arXiv 1011.6380hep-phhep-ex
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Tevatron和LHC的新强耦合扇区

New Strongly Coupled Sector at the Tevatron and the LHC

Gustavo Burdman, Leonardo de Lima, Ricardo D. Matheus

摘要:

我们研究的可能性,一个新的强相互作用是Tevatron和大型强子对撞机。在一个有效的理论方法中,我们考虑了一个新的色八重态相互作用与强耦合的顶夸克,以及存在一个强耦合的第四代,这可能是负责电弱对称性破缺的情况。我们应用了几个约束,包括来自风味物理学的约束。我们研究了在Tevatron产生的参数空间的现象学,重点是在顶部对生产的前后不对称性,以及在生产的第四代夸克。我们表明,如果顶部生产不对称性的过剩确实是这种新的相互作用的结果,Tevatron可以看到强耦合第四代夸克的第一个线索。最后,我们表明,与$\sqrt{s}=7~$ TeV和$1~{\rm fb}^{-1}$积分亮度的LHC应该观察到的第四代夸克的生产水平至少一个数量级以上的QCD预测这些国家的生产。

英文摘要:

We examine the possibility that a new strong interaction is accessible to the Tevatron and the LHC. In an effective theory approach, we consider a scenario with a new color-octet interaction with strong couplings to the top quark, as well as the presence of a strongly coupled fourth-generation which could be responsible for electroweak symmetry breaking. We apply several constraints, including the ones from flavor physics. We study the phenomenology of the resulting parameter space at the Tevatron, focusing on the the forward-backward asymmetry in top pair production, as well as in the production of the fourth-generation quarks. We show that if the excess in the top production asymmetry is indeed the result of this new interaction, the Tevatron could see the first hints of the strongly coupled fourth-generation quarks. Finally, we show that the LHC with $\sqrt{s}=7~$TeV and $1~{\rm fb}^{-1}$ integrated luminosity should observe the production of fourth-generation quarks at a level at least one order of magnitude above the QCD prediction for the production of these states.

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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