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arXiv 0903.2885hep-ph
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在LHC用W玻色子对对关联的希格斯玻色子产生的QCD修正

QCD corrections to associated Higgs boson production with a W boson pair at the LHC

Song Mao, Ma Wen-Gan, Zhang Ren-You, Guo Lei, Wang Shao-Ming, Han Liang

摘要:

大型强子对撞机(LHC)上与一对W玻色子相关的希格斯玻色子产生可用于探测希格斯玻色子和矢量规范玻色子之间的耦合,并发现新物理学的特征。本文描述了在LHC上,完整的QCD NLO辐射修正和胶子-胶子熔合子过程对该过程截面的影响,并研究了首阶(LO)和QCD修正截面对因子化/重整化能量标度和希格斯玻色子质量的依赖关系.我们给出了W玻色子对不变质量和末态W玻色子和希格斯玻色子横动量的LO和QCD修正分布。我们发现,QCD非线性光学修正和胶子-胶子熔合子过程的贡献对LO分布有显著的修正,并且LO结果严重低估了QCD修正后的截面的标度依赖性.计算结果表明,当$m_H$从$100 GeV$增加到$160 GeV$时,QCD修正的K因子从1.48变化到1.64。我们还发现LHC的\gghww子过程对QCD的修正是显著的,在精密实验中应予以考虑。

英文摘要:

The Higgs boson production in association with a pair of W-bosons at the Large Hadron Collider(LHC) can be used to probe the coupling between Higgs boson and vector gauge bosons and discover the signature of new physics. We describe the impact of the complete QCD NLO radiative corrections and the gluon-gluon fusion subprocesss to the cross section of this process at the LHC, and investigate the dependence of the leading order(LO) and the QCD corrected cross sections on the fctorization/renormalization energy scale and Higgs boson mass. We present the LO and QCD corrected distributions of the invariant mass of W-boson pair and the transverse momenta of final W and Higgs boson. We find that the QCD NLO corrections and the contribution from gluon-gluon fusion subprocess significantly modify the LO distributions, and the scale dependence of the QCD corrected cross section is badly underestimated by the LO results. Our numerical results show that the K-factor of the QCD correction varies from 1.48 to 1.64 when $m_H$ goes up from $100 GeV$ to $160 GeV$. We find also the QCD correction from \gghww subprocess at the LHC is significant, and should be considered in precise experiment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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