CTEQ-TEA group updates: Photon PDF and Impact from heavy flavors in the CT18 global analysis

hep-ph

/ Authors

Marco Guzzi, Keping Xie, Tie-Jiun Hou, Pavel Nadolsky, Carl Schmidt, Mengshi Yan, C. -P. Yuan

/ Abstract

We discuss recent CTEQ-TEA group activities after the publication of the CT18 global analysis of parton distribution functions (PDFs) in the proton. In particular, we discuss a new calculation for the photon content in the proton, termed as CT18lux and CT18qed PDFs, and the impact of novel charm- and bottom-quark production cross section measurements at HERA on the CT18 global analysis.