在不进行量子色动力学(quantum chromodynamics,QCD)整体分析的情况下,估算新数据对部分子分布函数(parton distribution functions,PDF)的影响,以及用更新的部分子分布函数预测其他可观测量不确定度的贡献是一项非常有用的工作。首先,...在不进行量子色动力学(quantum chromodynamics,QCD)整体分析的情况下,估算新数据对部分子分布函数(parton distribution functions,PDF)的影响,以及用更新的部分子分布函数预测其他可观测量不确定度的贡献是一项非常有用的工作。首先,用更新和优化的部分子分布函数软件ePump(error PDF updating method package)研究由CMS 8 TeV顶夸克对产生的微分散射截面(1/σ)dσ/dy_(t-t)、(1σ)dσ/dm_(t-t)、(1/σ)dσ/dy_(t)和(1/σ)dσ/dp^(t)T等实验数据对CT18NNLO胶子部分子分布函数的影响,然后,用更新后的部分子分布函数计算(1/σ)dσ/dy_(t-t)、(1/σ)dσ/dm_(t-t)、(1/σ)dσ/dy_(t)和(1/σ)dσ/dp^(t)T,并将计算所得理论值与实验值进行比较。结果表明,随着实验测量技术的发展,可获取的由顶夸克对产生的微分散射截面数据点越多,其对胶子部分子分布函数的确定作用越大。展开更多
In this paper we calculate the total and fiducial cross sections as well as differential distributions for the Higgs-strahlung or VH process pp→VH→lv1/1^-1~＋＋H,（V = W or Z, 1=e, μ） including QCD and electro-wea...In this paper we calculate the total and fiducial cross sections as well as differential distributions for the Higgs-strahlung or VH process pp→VH→lv1/1^-1~＋＋H,（V = W or Z, 1=e, μ） including QCD and electro-weak corrections up to next-to-leading order before and after reweighting photon PDFs of NNPDF2.3 qed, NNPDF3.0 qed,MRST2004 qed, CT14 QEDinc, and LUXqed at the LHC with 13 TeV and Higgs boson mass MH = 125 GeV. The predictions from the various photon PDFs before and after reweighting against each other are in good agreement.The photon PDF uncertainties of the photon-induced cross sections decrease significantly with the reweighting PDFs.展开更多
文摘在不进行量子色动力学(quantum chromodynamics,QCD)整体分析的情况下,估算新数据对部分子分布函数(parton distribution functions,PDF)的影响,以及用更新的部分子分布函数预测其他可观测量不确定度的贡献是一项非常有用的工作。首先,用更新和优化的部分子分布函数软件ePump(error PDF updating method package)研究由CMS 8 TeV顶夸克对产生的微分散射截面(1/σ)dσ/dy_(t-t)、(1σ)dσ/dm_(t-t)、(1/σ)dσ/dy_(t)和(1/σ)dσ/dp^(t)T等实验数据对CT18NNLO胶子部分子分布函数的影响,然后,用更新后的部分子分布函数计算(1/σ)dσ/dy_(t-t)、(1/σ)dσ/dm_(t-t)、(1/σ)dσ/dy_(t)和(1/σ)dσ/dp^(t)T,并将计算所得理论值与实验值进行比较。结果表明,随着实验测量技术的发展,可获取的由顶夸克对产生的微分散射截面数据点越多,其对胶子部分子分布函数的确定作用越大。
基金Supported by the National Natural Science Foundation of China(11465018)
文摘In this paper we calculate the total and fiducial cross sections as well as differential distributions for the Higgs-strahlung or VH process pp→VH→lv1/1^-1~＋＋H,（V = W or Z, 1=e, μ） including QCD and electro-weak corrections up to next-to-leading order before and after reweighting photon PDFs of NNPDF2.3 qed, NNPDF3.0 qed,MRST2004 qed, CT14 QEDinc, and LUXqed at the LHC with 13 TeV and Higgs boson mass MH = 125 GeV. The predictions from the various photon PDFs before and after reweighting against each other are in good agreement.The photon PDF uncertainties of the photon-induced cross sections decrease significantly with the reweighting PDFs.
