Higgs-boson production at small transverse momentum
Higgs-boson production at small transverse momentum
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DOI：
10.1007/jhep05(2013)110
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发表时间：
2012-12
影响因子：
5.4
通讯作者：
T. Becher;M. Neubert;Daniel Wilhelm
中科院分区：
文献类型：
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作者：
T. Becher;M. Neubert;Daniel Wilhelm
利用有效场论的方法，我们最近开发了一种新的系统框架，用于计算在小和非常小的横向动量q T下电弱规范玻色子产生的截面，其中尺度比m V/q T的大对数恢复到所有阶。这种形式被应用于在大型强子对撞机的胶子聚变中产生希格斯玻色子。生产截面从两个来源得到对数增强的修正：硬匹配系数的运行和共线分解异常。该异常导致非微扰尺度\({q_ {*}}\tilde {\mkern6mu}{m_H}{e^{{{{{-\mathrm {const}}}\left/{{{\alpha_s}\left ({{m_H}}\right)}}\right.}}}}\approx 8\) GeV的动态产生，从而保护该过程免受大的远距离强子贡献。我们提出了在大型强子对撞机产生的希格斯玻色子的横向动量谱的数值预测，发现它对强子效应相当不敏感。
Using methods from effective field theory, we have recently developed a novel, systematic framework for the calculation of the cross sections for electroweak gauge-boson production at small and very small transverse momentum q T, in which large logarithms of the scale ratio m V/q T are resummed to all orders. This formalism is applied to the production of Higgs bosons in gluon fusion at the LHC. The production cross section receives logarithmically enhanced corrections from two sources: the running of the hard matching coefficient and the collinear factorization anomaly. The anomaly leads to the dynamical generation of a non-perturbative scale\({q_ {*}}\tilde {\mkern6mu}{m_H}{e^{{{{{-\mathrm {const}}}\left/{{{\alpha_s}\left ({{m_H}}\right)}}\right.}}}}\approx 8\) GeV, which protects the process from receiving large long-distance hadronic contributions. We present numerical predictions for the transverse-momentum spectrum of Higgs bosons produced at the LHC, finding that it is quite insensitive to hadronic effects.