Higgs boson pair production: top quark mass effects at NLO and NNLO
Higgs boson pair production: top quark mass effects at NLO and NNLO
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DOI：
10.1016/j.nuclphysb.2015.09.012
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发表时间：
2015-08
期刊：
影响因子：
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通讯作者：
J. Grigo;J. Hoff;M. Steinhauser
中科院分区：
文献类型：
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作者：
J. Grigo;J. Hoff;M. Steinhauser
我们用软虚近似计算了大顶夸克质量极限下Higgs玻色子对胶子诱导产生截面的次前级QCD修正。在无限重顶夸克的极限下，我们证实了文献中的结果。我们在M t→∞结果中增加了两个顶夸克质量倒数的展开项。由于1/Mt展开式收敛较差，我们试图通过分解精确的前序截面来改进它。我们讨论了两种方法，并得出结论：有限顶夸克质量效应在次前级时最多使截面移动约10%，在次前级时最大移位约5%。
We compute next-to-next-to-leading order QCD corrections to the gluon-induced production cross section of Higgs boson pairs in the large top quark mass limit using the soft-virtual approximation. In the limit of infinitely-heavy top quark we confirm the results in the literature. We add two more expansion terms in the inverse top quark mass to the M t→∞ result. Since the 1/M t expansion converges poorly, we try to improve on it by factorizing the exact leading order cross section. We discuss two ways of doing that and conclude that the finite top quark mass effects shift the cross section at most by about 10% at next-to-leading order and by about 5% at next-to-next-to-leading order.