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Volume 352 - XXVII International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2019) - Working Group 1: Structure Function and Parton Densiies
Impact of LHC top-quark pair measurements to CTEQ-TEA PDF analysis
T.J. Hou,* O. Amat, M. Czakon, S. Dulat, J.W. Huston, A. Mitov, A. Papanastasiou, C. Schmidt, I. Sitiwaldi, K. Xie, Z. Yu, C.P. Yuan
*corresponding author
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Pre-published on: 2019 August 20
Published on: 2019 October 04
Detailed studies have been carried out on the impact of the LHC top quark pair production data on gluon PDF, in the context of the CTEQ-TEA global PDF fit, with the ePump-updating method. The considered $t\bar{t}$ data include single differential distributions from ATLAS and double differential distributions from CMS, both at 8 TeV. All analyses have been carried out at the NNLO, using fastNNLO tables. We show that the sensitivity per data point of the LHC $t\bar{t}$ data is similar to that of jet data, as included in the CT14HERA2 fit, while the total sensitivity of the present $t\bar{t}$ data is not as large as the jet data because of the much smaller number of $t\bar{t}$ data points in the presently available data.
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