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; J. F. Owens; I. Schienbein; J. Y. Yu

arXiv · 1909.00452

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·J. F. Owens·I. Schienbein·J. Y. Yu

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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.

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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, J. F. Owens, I. Schienbein, J. Y. Yu. 2019-09-01. nCTEQ PDFs at the LHC: Vector boson production in heavy ion collisions. https://arxiv.org/abs/1909.00452

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