A polarised QCD condensate: nu p elastic scattering as a probe of U_A(1) dynamics
High Energy Physics - Phenomenology
2009-10-30 v2
Abstract
U_A(1) dynamics have the potential to induce a polarised condensate inside a nucleon. The formation of this condensate is related to the realisation of U_A(1) symmetry breaking by tunneling processes such as instantons. If it is present, the polarised condensate induces a term in g_1 which has support only at x=0. Tunneling processes then induce a net transfer of ``spin'' from finite x to x=0. The polarised condensate may be measured by comparing the flavour-singlet axial charges which are extracted from polarised deep inelastic and nu p elastic scattering experiments.
Cite
@article{arxiv.hep-ph/9712507,
title = {A polarised QCD condensate: nu p elastic scattering as a probe of U_A(1) dynamics},
author = {S. D. Bass},
journal= {arXiv preprint arXiv:hep-ph/9712507},
year = {2009}
}
Comments
13 pages LaTeX, Section 3 improved to include discussion of the 3 flavour quark instanton interaction; to appear in Mod. Phys. Lett. A