QCD analysis of CMS W + charm measurements at LHC with
and implications for strange PDF Supported by the National Natural Science Foundation of China (11965020)
Nijat Yalkun (
Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China,
School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046 China); Sayipjamal Dulat (
School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046 China)
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. We compare the results with measurements from the CMS detector at the LHC at a center-of-mass energy of 7 TeV. Moreover, we 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. The correlation between the CT14NNLO PDFs and predictions for
charm data are studied as well. Furthermore, by employing the error PDF updating method proposed by the CTEQ-TEA group, we update CT14NNLO PDFs, and analyze the impact of CMS 7 TeV
charm production data to the original CT14NNLO PDFs. By comparison of the
,
,
,
,
, and
PDFs at
GeV and
GeV for the CT14NNLO and CT14NNLO+Wc, we see that the error band of the
PDF is reduced in the region
, and the error band of
PDF is also slightly reduced at region
.
