pp→VH总散射界面中的NLO QCD修正
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摘要
大型强子对撞机上希格斯粒子与矢量波色子的联合产生过程pp→VH→lν_l/l~-l~++H,(V=W,Z)被称为希格斯韧致辐射过程或者VH过程.该文章中用蒙特卡罗数值计算程序HAWK,并使用NNPDF2.3QED、NNPDF3.0QED、MRST2004QED、CT14QEDinc和LUXqed等部分子分布函数计算出,当质心系能量为13 TeV,希格斯粒子的质量为125 GeV时希格斯韧致辐射过程的次领头阶QCD和电弱修正的总散射截面,微分散射截面,以及次领头阶QCD和EW修正对领头阶散射界面的贡献.次领头阶QCD修正使VH过程的领头阶散射界面增加为+17%,次领头阶电弱修正对领头阶散射截面的贡献依赖于光子部分子分部函数.
The associate production of Higgs bosons with a vector bosons is known as Higgs-strahlung or VH process pp→VH→lv_l/l~-l~+ + H,(V=W, Z). In this paper,while center-mass energy is 13 TeV and the quality of Higgs-boson is 125 GeV, using the NNPDF2.3 QED,NNPDF3.0 QED, MRST2004 QED, CT14 QEDinc and LUXqed,the total cross sections and differential cross sections of next-to-leading QCD and electroweak correction for Higgs-strahlung process, and the contribution of next-to-leading QCD and EW correction on the leading cross section are calculated with HAWK. The next-to-leading QCD corrections increases the leading cross section by about +17%, the contribution of next-to-leading electroweak correction on the leading cross section depends on the PDFs.
The associate production of Higgs bosons with a vector bosons is known as Higgs-strahlung or VH process pp→VH→lv_l/l~-l~+ + H,(V=W, Z). In this paper,while center-mass energy is 13 TeV and the quality of Higgs-boson is 125 GeV, using the NNPDF2.3 QED,NNPDF3.0 QED, MRST2004 QED, CT14 QEDinc and LUXqed,the total cross sections and differential cross sections of next-to-leading QCD and electroweak correction for Higgs-strahlung process, and the contribution of next-to-leading QCD and EW correction on the leading cross section are calculated with HAWK. The next-to-leading QCD corrections increases the leading cross section by about +17%, the contribution of next-to-leading electroweak correction on the leading cross section depends on the PDFs.
引文
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[3] SCHMIDT C, PUMPLIN J, STUMP D, et al. CT14QED PDFs from isolated photon production in deep inelastic scattering[J].High Energy Physics-Phenoroenology,http://arxiv.org/abs/1509.02905.
[4] BALL R D, BERTONE V, CARRAZZA S, et al. Parton distributions with QED corrections[J].Nuclear Physics B,2013,877(2):290-320.
[5] BALL R D, BERTONE V, CARRAZZA S, et al. Parton distributions for the LHC run II[J].Journal of High Energy Physics,2015,2015(4):40.
[6] MARTIN A D, ROBERTS R G, STIRLING W J, et al. Parton distributions incorporating QED contributions[J].The European Physical Journal C-Particles and Fields,2005,39(2):155-161.
[7] MANOHAR A, NASON P, SALAM G P, et al. How bright is the proton? A precise determination of the photon parton distribution function[J].Phy Rev Lett,2016,117(24):242002.