Parton distributions for the LHC run II
Parton distributions for the LHC run II
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DOI：
10.1007/jhep04(2015)040
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发表时间：
2015-04-08
影响因子：
5.4
通讯作者：
Ubiali, Maria
中科院分区：
文献类型：
--
作者：
Ball, Richard D.;Bertone, Valerio;Ubiali, Maria
我们提供NNPDF3.0，这是通过通过闭合测试验证的方法确定的第一组Parton分布函数（PDF）。 NNPDF3.0使用一个全球数据集，包括HERA-II深弹性包容性横截面，HERA魅力数据，ATLAS和CMS的JET生产，Vector Boson Rapidity以及来自Atlas，CMS和LHCB的横向动量分布，W +C数据来自CMS和顶级夸克对产生的总横截面来自Atlas和CMS。结果基于LO，NLO和NNLO QCD理论，还包括电动校正。为了验证我们的方法论，我们表明从已知的基础定律产生的伪数据确定的PDF可以根据假定的实验不确定性正确重现预期的统计分布。该封闭测试可确保与PDF确定的一般理论和实验不确定性相比，我们的方法论中的不确定性可忽略不计。这使我们能够在不同的扰动订单上以置信度PDF确定，并使用从HERA的各种实验数据集到包括最新的LHC结果（包括最新的LHC结果）的各种实验数据集，所有这些都使用了完全相同的经过验证的方法。我们探讨了我们结果对即将到来的LHC的13次TEV运行的一些现象学含义，尤其是HIGGS生产横截面。
We present NNPDF3.0, the first set of parton distribution functions (PDFs) determined with a methodology validated by a closure test. NNPDF3.0 uses a global dataset including HERA-II deep-inelastic inclusive cross-sections, the combined HERA charm data, jet production from ATLAS and CMS, vector boson rapidity and transverse momentum distributions from ATLAS, CMS and LHCb, W +c data from CMS and top quark pair production total cross sections from ATLAS and CMS. Results are based on LO, NLO and NNLO QCD theory and also include electroweak corrections. To validate our methodology, we show that PDFs determined from pseudo-data generated from a known underlying law correctly reproduce the statistical distributions expected on the basis of the assumed experimental uncertainties. This closure test ensures that our methodological uncertainties are negligible in comparison to the generic theoretical and experimental uncertainties of PDF determination. This enables us to determine with confidence PDFs at different perturbative orders and using a variety of experimental datasets ranging from HERA-only up to a global set including the latest LHC results, all using precisely the same validated methodology. We explore some of the phenomenological implications of our results for the upcoming 13 TeV Run of the LHC, in particular for Higgs production cross-sections.