Color fluctuation approximation for multiple interactions in leading twist theory of nuclear shadowing

Abstract

The leading twist theory of nuclear shadowing predicts the shadowing correction to nuclear parton distributions at small $x$ by connecting it to the leading twist hard diffraction in electron-nucleon scattering. The uncertainties of the predictions are related to the shadowing effects resulting from the interaction of the hard probe with $N\ge 3$ nucleons. We argue that the pattern of hard diffraction observed at HERA allows one to reduce these uncertainties. We develop a new approach to the treatment of these multiple interactions, which is based on the concept of the color fluctuations and accounts for the presence of both point-like and hadron-like configurations in the virtual photon wave function. Using the developed framework, we update our predictions for the leading twist nuclear shadowing in nuclear parton distributions of heavy nuclei at small $x$.

16 pages, 4 figures. Revised to address the Referee's comments. Matches the published version, PLB 687 (2010) 167.

References in corpus (4)

• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• The Physics of Ultraperipheral Collisions at the LHC
• Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
• Gluon shadowing in the Glauber-Gribov model at HERA

Cited by in corpus (12)

• A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector
• Global Analysis of Nuclear Parton Distributions
• Proton-Nucleus Collisions at the LHC: Scientific Opportunities and Requirements
• Impact-parameter dependent nuclear parton distribution functions: EPS09s and EKS98s and their applications in nuclear hard processes
• Multiple parton interactions and forward double pion production in pp and dA scattering
• Numerical solution of $Q^2$ evolution equations for fragmentation functions
• Nuclear PDFs at NLO - status report and review of the EPS09 results
• Role of nuclear gluon distribution on particle production in heavy ion collisions
• Nuclear effects on the longitudinal structure function at small x
• Massive neutral gauge boson production as a probe of nuclear modifications of parton distributions at the LHC
• Global analysis of nuclear PDFs - latest developments
• Leading twist shadowing, black disk regime and forward hadron production