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QCD analysis of the CMS W + charm measurements at the LHC at a sqrt s = 7TeV and implications for the strange PDF | | Nijat Yalkun
; Sayipjamal Dulat
; Tie-Jiun Hou
; | | Date: |
31 Jul 2019 | | Abstract: | We calculate cross sections and cross section ratios of a charm quark
production in association with a W gauge boson at next-to-leading order QCD
using MadGraph and CT10NNLO, CT14NNLO and MSTW2008NNLO PDFs, and compare with
the measurements from the CMS detector at the LHC at a center-of-mass energy of
7TeV. We also calculate absolute and normalized differential cross sections as
well as differential cross section ratios as a function of the lepton
pseudorapidity from the W boson decay. Correlation between the CT14NNLO PDFs
and predictions for W+charm data are studied as well. Furthermore by employing
Error PDF Updating Method proposed by CTEQ-TEA group, we update CT14NNLO PDFs,
and analyze the impact of CMS 7TeV W+charm production data to the original
CT14NNLO PDFs. By comparison of the g(x,Q), s(x,Q), u(x,Q), d(x,Q), ar
u(x,Q), and ar d(x,Q) PDFs at Q=1.3 GeV and Q = 100 GeV for the CT14NNLO and
CT14NNLO+Wc, we see that the error band of the s(x,Q) PDF is reduced at region
x<0.4, and error band of g(x,Q) PDF is also slightly reduced at region 0.01 < x
< 0.1. | | Source: | arXiv, 1908.0026 | | Services: | Forum | Review | PDF | Favorites | |
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