nCTEQ15: Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review D Year : 2016

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

K. Kovarik
  • Function : Author
T. Jezo
  • Function : Author
D.B. Clark
  • Function : Author
C. Keppel
  • Function : Author
F. Lyonnet
  • Function : Author
J.G. Morfin
  • Function : Author
F.I. Olness
  • Function : Author
J.F. Owens
  • Function : Author
J.Y. Yu
  • Function : Author

Abstract

We present the new nCTEQ15 set of nuclear parton distribution functions with uncertainties. This fit extends the CTEQ proton PDFs to include the nuclear dependence using data on nuclei all the way up to 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 (DIS) and Drell-Yan (DY) processes, we also include inclusive pion production data from RHIC to help constrain the nuclear gluon PDF. Furthermore, we investigate the correlation of the data sets with specific nPDF flavor components, and asses the impact of individual experiments. We also provide comparisons of the nCTEQ15 set with recent fits from other groups.

Dates and versions

in2p3-01192579 , version 1 (03-09-2015)

Identifiers

Cite

K. Kovarik, A. Kusina, T. Jezo, D.B. Clark, C. Keppel, et al.. nCTEQ15: Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework. Physical Review D, 2016, 93, pp.085037 ⟨10.1103/PhysRevD.93.085037⟩. ⟨in2p3-01192579⟩
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