The evolution of σγP with coherence length. (11th July 2016)

• Record Type: Journal Article
• Authors: Caldwell, Allen
• Is Part Of: New journal of physics. Volume 18:Number 7(2016:Jul.)
• Publication Date: 2016-07-11
• Subjects: high energy cross sections -- saturation -- parton densities; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/18/7/073019
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: Assuming the form σ γ P ∝ l λ eff at fixed Q 2 for the behavior of the virtual-photon proton scattering cross section, where l is the coherence length of the photon fluctuations, it is seen that the extrapolated values of σ γ P for different Q 2 cross for l ≈ 10 8 fm. It is argued that this behavior is not physical, and that the behavior of the cross sections must change before this coherence length l is reached. This could set the scale for the onset of saturation of the parton densities in the photon, and thereby saturation of parton densities in general.