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arXiv 1409.6299hep-ph
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Higgs+喷流产生的有效场论

Effective Field Theory for Higgs Plus Jet Production

S. Dawson, I. M. Lewis, Mao Zeng

摘要:

我们使用一个包含所有可能的5维和7维胶子-Higgs算符的有效场论来研究希格斯玻色子玻色子和喷注的产生。EFT揭示了有限顶夸克质量的影响,以及任何超越标准模型(BSM)修改的希格斯-胶子有效耦合。在胶子通道中,微分分布的重顶近似的准确性来自于在最低阶m_h < p_T极限下G^3 h和G^2 h算符的螺旋度振幅之间的不干涉。然而,一个涉及夸克双线性的7维算符在高p_T下有显著的贡献,并可能提供一个观察BSM效应的通道。确定了这些算符的单圈重整化,通过运行重整化群,可以对大的算符进行重整化。给出了LHC上的非线性光学数值计算结果,其中包括了SM极限下O(1/m_t^2)的贡献.

英文摘要:

We use an effective field theory (EFT) which includes all possible gluon-Higgs dimension-5 and dimension-7 operators to study Higgs boson plus jet production in next-to-leading order QCD. The EFT sheds light on the effect of a finite top quark mass as well as any Beyond-the-Standard Model (BSM) modifications of Higgs-gluon effective couplings. In the gluon channel, the accuracy of the heavy-top approximation for differential distributions arises from the non-interference between the helicity amplitudes of the G^3 h and G^2 h operators in the m_h < p_T limit at lowest order. One dimension-7 operator involving quark bilinears, however, contributes significantly at high p_T, and potentially offers a channel for seeing BSM effects. One-loop renormalization of these operators is determined, allowing resummation of large logarithms via renormalization group running. NLO numerical results at the LHC are presented, which include O(1/m_t^2) contributions in the SM limit.

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