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Volume 352 - XXVII International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2019) - Working Group 1: Structure Function and Parton Densiies
nCTEQ PDFs and the strange PDF at LHC - Vector boson production in heavy ion collisions
D.B. Clark, E. Godat, T.J. Hobbs, T. Jezo, J. Kent, C. Keppel, M. Klasen, K. Kovarik, A. Kusina, F. Lyonnet, J.G. Morfin, F. Olness,* J.F. Owens, I. Schienbein, J.Y. Yu The nCTEQ Collaboration
*corresponding author
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Pre-published on: 2019 August 16
Published on: 2019 October 04
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 p-Pb LHC W/Z vector boson data.
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