Published March 23, 2009 | Version v1
Journal article Metadata-only

The Color Dipole Picture and the Ratio of the Longitudinal to the Transverse Photoabsorption Cross Section

Creators

  • 1. Fakultaet fuer Physik, Universitaet Bielefeld, D-33615 Bielefeld (Germany) and Max-Planck Institut fuer Physik (Werner-Heisenberg-Institut) Foehringer Ring 6, D-80805 Muenchen (Germany)

Description

The transverse size of qq-bar fluctuations of a longitudinally polarized photon is reduced relative to the transverse size of qq-bar fluctuations of a transversely polarized photon. This implies a model-independent prediction of the ratio R(W2,Q2)≡σL/σT = 0.375, or, equivalently, FL/F2 = 0.27, for x congruent with Q2/W2<<1 and Q2 sufficiently large, while R(W2,Q2) 0.50, if this effect is ignored. Experimental data from HERA confirm the transverse-size reduction.

Additional details

Identifiers

DOI
10.1063/1.3122193;
arXiv
arXiv:0811.3467v1;

Publishing Information

Journal Title
AIP Conference Proceedings
Journal Volume
1105
Journal Issue
1
Journal Page Range
p. 278-282
ISSN
0094-243X
CODEN
APCPCS

Conference

Title
International workshop on diffraction in high energy physics
Acronym
DIFFRACTION 2008
Dates
9-14 Sep 2008
Place
La Londe-les-Maures (France)

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
41039451
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
COLOR MODEL; COMPTON EFFECT; CROSS SECTIONS; DIPOLES; FLUCTUATIONS; FOUR MOMENTUM TRANSFER; HADRONS; HERA STORAGE RING; PARTICLE KINEMATICS; PHOTONS; POLARIZATION; QUANTUM CHROMODYNAMICS; QUARKS
Descriptors DEC
BASIC INTERACTIONS; BOSONS; COMPOSITE MODELS; ELASTIC SCATTERING; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; INTERACTIONS; MASSLESS PARTICLES; MATHEMATICAL MODELS; MOMENTUM TRANSFER; MULTIPOLES; PARTICLE MODELS; QUANTUM FIELD THEORY; QUARK MODEL; SCATTERING; STORAGE RINGS; VARIATIONS

Optional Information

Notes
(c) 2009 American Institute of Physics