CTEQ-TEA parton distribution functions with intrinsic charm

Marco Guzzi; Tie-Jiun Hou; Sayipjamal Dulat; Jun Gao; Joey Huston; Pavel Nadolsky; Carl Schmidt; Jan Winter; Keping Xie; C. -P. Yuan

doi:10.1051/epjconf/201819200003

arXiv · 1810.00264

CTEQ-TEA parton distribution functions with intrinsic charm

Marco Guzzi·Tie-Jiun Hou·Sayipjamal Dulat·Jun Gao·Joey Huston·Pavel Nadolsky·Carl Schmidt·Jan Winter·Keping Xie·C. -P. Yuan

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Abstract

The possibility of a (sizable) nonperturbative contribution to the charm parton distribution function (PDF) in a nucleon is investigated together with theoretical issues arising in its interpretation. Results from the global PDF analysis are presented. The separation of the universal component of the nonperturbative charm from the rest of the radiative contributions is discussed and the potential impact of a nonperturbative charm PDF on LHC scattering processes is illustrated. An estimate of nonperturbative charm magnitude in the CT14 and CT14HERA2 global QCD analyses at the next-to-next-to leading order (NNLO) in the QCD coupling strength is given by including the latest experimental data from HERA and the Large Hadron Collider (LHC). A comparison between different models of intrinsic charm is shown and prospects for standard candle observables at the LHC are illustrated.

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Marco Guzzi, Tie-Jiun Hou, Sayipjamal Dulat, Jun Gao, Joey Huston, Pavel Nadolsky, Carl Schmidt, Jan Winter, Keping Xie, C. -P. Yuan. 2018-09-29. CTEQ-TEA parton distribution functions with intrinsic charm. https://doi.org/10.1051/epjconf/201819200003

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