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arXiv 1206.0157hep-ph
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α_s^4阶胶子聚变产生差异希格斯粒子的顶质量效应

Top-mass effects in differential Higgs production through gluon fusion at order α_s^4

Robert V. Harlander, Tobias Neumann, Kemal J. Ozeren, Marius Wiesemann

摘要:

研究了强耦合下次主导阶($O(α_s^4)$)有限顶夸克质量对胶子融合Higgs+喷注产生截面微分分布的影响.计算了$1/m_t$中的形式子项,并讨论了它们对希格斯玻色子横动量和快度分布的影响.我们发现,对于微分K因子,只要Higgs的横向动量保持在150 GeV以下,重上限在2-3%水平是有效的。

英文摘要:

Effects from a finite top quark mass on differential distributions in the Higgs+jet production cross section through gluon fusion are studied at next-to-leading order in the strong coupling, i.e. $O(α_s^4)$. Terms formally subleading in $1/m_t$ are calculated, and their influence on the transverse momentum and rapidity distribution of the Higgs boson are evaluated. We find that, for the differential K-factor, the heavy-top limit is valid at the 2-3% level as long as the transverse momentum of the Higgs remains below about 150 GeV.

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