arXiv:1909.00452·v1·High Energy Physics — Phenomenology
nCTEQ PDFs at the LHC: Vector boson production in heavy ion collisions
The nCTEQ Collaboration: D. B. Clark🇺🇸 · E. Godat🇺🇸 · T. J. Hobbs🇺🇸 · T. Ježo🇨🇭 · J. Kent🇺🇸 · C. Keppel🇺🇸 · M. Klasen🇩🇪 · K. Kovarík🇩🇪 · A. Kusina🇵🇱 · F. Lyonnet🇺🇸 · J.G. Morfin🇺🇸 · F. I. Olness🇺🇸
Abstract
Extraction of the strange quark PDF is a long-standing puzzle. We use the nCTEQ nPDFs with uncertainties to study the impact of the LHC W/Z production data on both the flavor differentiation and nuclear corrections; this complements the information from neutrino-DIS data. As the proton flavor determination is dependent on nuclear corrections (from heavy target DIS, for example), LHC heavy ion measurements can also help improve proton PDFs. We introduce a new implementation of the nCTEQ code (nCTEQ++) based on C++ which has a modular strucure and enables us to easily integrate programs such as HOPPET, APPLgrid, and MCFM. Using ApplGrids generated from MCFM, we use nCTEQ++ to perform a preliminary fit including the pPb LHC W/Z vector boson data.
Comments: 6 pages, 4 figures. DIS2019 Workshop, Torino, Italy