Impact of LHC top-quark pair measurements to CTEQ-TEA PDF analysis
Abstract
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 tt 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 tt data is similar to that of jet data, as included in the CT14HERA2 fit, while the total sensitivity of the present tt data is not as large as the jet data because of the much smaller number of tt data points in the presently available data.
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