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arXiv 1003.2046hep-ph
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胶子聚变中色八重态标量效应对希格斯玻色子玻色子产生的影响

Color-octet scalar effects on Higgs boson production in gluon fusion

Radja Boughezal, Frank Petriello

摘要:

我们用有效理论方法计算了在${\bf (8,1)_0}$表象中含有大量色八重标量的模型中希格斯玻色子胶子融合产生的次-次-领先阶QCD修正。我们推导出一个紧凑的相关威尔逊系数的解析表达式,并解释了一个有趣的技术方面的计算,需要列入下一个到下一个到领先的顺序的四次标量相互作用。我们进行重整化群分析的标量耦合,推导出参数空间的允许区域,并提出了Tevatron和LHC的唯象结果。希格斯粒子产生截面的修正在两台对撞机上都很大,在参数空间的允许区域内,可以将标准模型的速率提高两倍以上。我们估计,严格的约束色八隅标量参数可以得到使用Tevatron排斥限制希格斯生产。

英文摘要:

We compute the next-to-next-to-leading order QCD corrections to the gluon-fusion production of a Higgs boson in models with massive color-octet scalars in the ${\bf (8,1)_0}$ representation using an effective-theory approach. We derive a compact analytic expression for the relevant Wilson coefficient, and explain an interesting technical aspect of the calculation that requires inclusion of the quartic-scalar interactions at next-to-next-to-leading order. We perform a renormalization-group analysis of the scalar couplings to derive the allowed regions of parameter space, and present phenomenological results for both the Tevatron and the LHC. The modifications of the Higgs production cross section are large at both colliders, and can increase the Standard Model rate by more than a factor of two in allowed regions of parameter space. We estimate that stringent constraints on the color-octet scalar parameters can be obtained using the Tevatron exclusion limit on Higgs production.

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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