Spin constraints on Regge predictions and perturbative evolution in high energy collisions

Abstract

Two key issues in the application of perturbative QCD and Regge predictions to high energy processes are whether the hard and soft pomerons should be considered as two separate distinct exchanges and whether the Regge intercepts are Q^2 independent or not. Models involving a distinct hard pomeron exchange predict much larger values for the LHC total cross-section. Here we argue that there is a polarized analogue of this issue in the isovector part of the spin structure function g_1 and that the spin data appear to favour a distinct hard exchange.

8 pages

References in corpus (5)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• The Spin Structure of the Proton
• Perturbatively Stable Resummed Small x Evolution Kernels
• Non-singlet structure functions: Combining the leading logarithms resummation at small-x with DGLAP
• Theoretical expectations for total cross-sections at the large hadron collider

Cited by in corpus (8)

• The Spin Structure of the Nucleon
• The Spin-dependent Structure Function of the Proton g_1^p and a Test of the Bjorken Sum Rule
• The Spin Structure of the Nucleon
• Polarized DIS in N=4 SYM: Where is spin at strong coupling?
• Small- and large-x nucleon spin structure from a global QCD analysis of polarized Parton Distribution Functions
• The proton spin puzzle: where are we today ?
• Updating spin-dependent Regge intercepts
• Non-Singlet spin structure function in the valon model and low x scaling behavior of $g_1^{NS}$ and $g_1^p$