nCTEQ15: Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework

We present the new nCTEQ15 set of nuclear parton distribution functions (PDFs) with uncertainties. This fit extends the CTEQ proton PDFs to include the nuclear dependence using data on nuclei all the way up to super(208) Pb. The uncertainties are determined using the Hessian method with an optimal r...

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Bibliographic Details
Published in:Physical review. D 2016-04, Vol.93 (8), Article 085037
Main Authors: Kovařík, K., Kusina, A., Ježo, T., Clark, D. B., Keppel, C., Lyonnet, F., Morfín, J. G., Olness, F. I., Owens, J. F., Schienbein, I., Yu, J. Y.
Format: Article
Language:English
Subjects:
Correlation
Eigenvectors
Gravitation
High Energy Physics - Phenomenology
Nuclei
Partons
Physics
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Portable document format
Uncertainty
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Summary:We present the new nCTEQ15 set of nuclear parton distribution functions (PDFs) with uncertainties. This fit extends the CTEQ proton PDFs to include the nuclear dependence using data on nuclei all the way up to super(208) Pb. The uncertainties are determined using the Hessian method with an optimal rescaling of the eigenvectors to accurately represent the uncertainties for the chosen tolerance criteria. In addition to the deep inelastic scattering and Drell-Yan processes, we also include inclusive pion production data from the Relativistic Heavy Ion Collider to help constrain the nuclear gluon PDF. Furthermore, we investigate the correlation of the data sets with specific nuclear PDF flavor components and asses the impact of individual experiments. We also provide comparisons of the nCTEQ15 set with recent fits from other groups.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.93.085037