The black-disk limit in high-energy ep and pp scattering

Conference · Mon Oct 24 04:00:00 EDT 2005

OSTI ID:876015

Strikman, Mark; Weiss, Christian

We review a recently proposed framework for studying the approach to the unitarity limit in small-x 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 ''black-disk 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.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA
• Sponsoring Organization: USDOE - Office of Energy Research (ER)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 876015
• Report Number(s): JLAB-THY-06-461; DOE/ER/40150-3712; hep-ph/0601259
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COLOR
DIPOLES
FACTORIZATION
GLUONS
PRODUCTION
PROTONS
QUANTUM CHROMODYNAMICS
SCATTERING
SPATIAL DISTRIBUTION
UNITARITY
VECTOR MESONS