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

Journal Article · Tue Jul 11 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2220229· OSTI ID:20873269

Strikman, M ^[1]; Weiss, C ^[2]

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1. Department of Physics, Pennsylvania State University, University Park, PA 16802 (United States)
2. Theory Center, Jefferson Lab, Newport News, VA 23606 (United States)

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.

• OSTI ID: 20873269
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 842; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
CERN LHC
COLOR MODEL
DIPOLES
ELECTRON-PROTON INTERACTIONS
FACTORIZATION
GLUONS
HERA STORAGE RING
PARTICLE PRODUCTION
PROTON-PROTON INTERACTIONS
PROTONS
QUANTUM CHROMODYNAMICS
RESONANCE PARTICLES
SCATTERING
SPATIAL DISTRIBUTION
UNITARITY
VECTOR MESONS