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

Strikman, M. ; Weiss, C.

Technical Information Center Oak Ridge Tennessee

关键词: Gluons;    Protons;    Scattering;    Dipoles;    Color;   

RP-ID  :  DE2006875586

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

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.