CTEQ-TEA group updates: Photon PDF and Impact from heavy flavors in the CT18 global analysis
Marco Guzzi, Keping Xie, Tie-Jiun Hou, Pavel Nadolsky, Carl Schmidt,, Mengshi Yan, and C.-P. Yuan
TL;DR
This paper updates the proton's parton distribution functions by introducing a new photon content calculation and analyzing the impact of recent heavy-flavor production measurements from HERA on the global analysis.
Contribution
It presents new photon PDFs (CT18lux and CT18qed) and assesses how recent heavy-flavor data influence the CT18 global analysis of PDFs.
Findings
New photon PDFs developed for proton structure modeling
Heavy-flavor measurements significantly impact the global PDF fits
Enhanced understanding of proton's photon and heavy-flavor content
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.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · High-Energy Particle Collisions Research · Quantum Chromodynamics and Particle Interactions