National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Black-Disk Limit in High-Energy ep and pp Scattering.

DE2006875586

Publication Date	2006
Personal Author	Strikman, M.; Weiss, C.
Page Count	10
Abstract	We review a recently proposed framework for studying the approach to the unitarity limit in smallx processes in ep and pp scattering within the DGLAP approximation. Our formulation is based on the correspondence between the standard QCD factorization theorems for hard processes and the dipole picture of small-x scattering in the leading logarithmic approximation. It allows us to incorporate information about the transverse spatial distribution of gluons in the proton from exclusive vector meson production at HERA. We show that the interaction of small-size color singlet configurations with the proton approaches the blackdisk limit (BDL) due to the growth of the DGLAP gluon density at small x. This new dynamical regime is marginally visible in diffractive DIS at HERA, and will be fully reached in central pp collisions at LHC.
Keywords	Gluons Protons Scattering Dipoles Color Nuclei Nucleons Partons Production Quantum chromodynamics Spatial distribution Strong interactions Unitarity
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Pennsylvania State Univ., University Park. Dept. of Physics.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200620

Black-Disk Limit in High-Energy ep and pp Scattering.

Black-Disk Limit in High-Energy ep and pp Scattering.
DE2006875586

Publication Date	2006
Personal Author	Strikman, M.; Weiss, C.
Page Count	10
Abstract	We review a recently proposed framework for studying the approach to the unitarity limit in smallx processes in ep and pp scattering within the DGLAP approximation. Our formulation is based on the correspondence between the standard QCD factorization theorems for hard processes and the dipole picture of small-x scattering in the leading logarithmic approximation. It allows us to incorporate information about the transverse spatial distribution of gluons in the proton from exclusive vector meson production at HERA. We show that the interaction of small-size color singlet configurations with the proton approaches the blackdisk limit (BDL) due to the growth of the DGLAP gluon density at small x. This new dynamical regime is marginally visible in diffractive DIS at HERA, and will be fully reached in central pp collisions at LHC.
Keywords	Gluons Protons Scattering Dipoles Color Nuclei Nucleons Partons Production Quantum chromodynamics Spatial distribution Strong interactions Unitarity
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Pennsylvania State Univ., University Park. Dept. of Physics.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200620