Soft gluon resummation for gluon-induced Higgs Strahlung
Soft gluon resummation for gluon-induced Higgs Strahlung
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DOI：
10.1007/jhep11(2014)082
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发表时间：
2014-10
影响因子：
5.4
通讯作者：
R. Harlander;A. Kulesza;V. Theeuwes;T. Zirke
中科院分区：
文献类型：
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作者：
R. Harlander;A. Kulesza;V. Theeuwes;T. Zirke
我们研究了软胶子发射对 LHC 中 gg→ HZ 相关希格斯粒子生产过程的总截面预测的影响。为此，我们在绝对阈值生产极限和具有给定不变质量的 ZH 系统的生产阈值极限的 NLL 精度下执行阈值校正的恢复。提出了各种可能的大型强子对撞机碰撞能量的分析结果和数值预测。通过包含通用 NNLL 效应来验证结果的微扰稳定性。我们发现，恢复显着降低了 gg→ HZ 贡献的规模不确定性，这是 ZH 生产扰动不确定性的主要来源。我们使用我们的结果来评估大型强子对撞机上相关 pp→ ZH 生产的总包容截面的更新数字。 gg→ HZ 分量的尺度不确定性降低意味着总体尺度误差减少了大约两倍。
We study the effect of soft gluon emission on the total cross section predictions for the gg→ HZ associated Higgs production process at the LHC. To this end, we perform resummation of threshold corrections at the NLL accuracy in the absolute threshold production limit and in the threshold limit for production of a ZH system with a given invariant mass. Analytical results and numerical predictions for various possible LHC collision energies are presented. The perturbative stability of the results is verified by including universal NNLL effects. We find that resummation significantly reduces the scale uncertainty of the gg→ HZ contribution, which is the dominant source of perturbative uncertainty to ZH production. We use our results to evaluate updated numbers for the total inclusive cross section of associated pp→ ZH production at the LHC. The reduced scale uncertainty of the gg→ HZ component translates into a decrease of the overall scale error by about a factor of two.