The ratio of sigma_L/sigma_T in DIS at low x

2007/07/23 by D. Schildknecht, Dieter Schildknecht, Schildknecht, Dieter
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.0707.3379

4 pages, 4 figures, contribution to the proceedings of DIS2007

arxiv created 2007/07/23 · arxiv updated 2009/12/01

Abstract

Assuming helicity independence for q-qbar scattering in the color-dipole picture, or, equivalently proportionality of sea quark and gluon distributions, we find R(W²,Q²) = 0.5 (approximately) at large Q², where R(W²,Q²) denotes the ratio of the longitudinal and transverse photoabsorption cross sections. The forthcoming direct measurements of R(W²,Q²) allow one to test the underlying hypotheses.

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