Instantons and Single Spin Asymmetries
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
A new mechanism for single spin asymmetries in strong interaction is proposed. It is based on instanton-induced nonperturbative chromomagnetic quark-gluon interaction. We estimate the contribution of this interaction to single spin asymmetry in quark-quark scattering. It is shown, that interference between quark spin-flip amplitude induced by instantons and spin-nonflip amplitude, which is related to nonperturbative two gluon exchange, gives a large value for a single spin asymmetry. Due to strong increasing of the instanton-induced spin-flip amplitude with energy, this asymmetry does not vanish at high energies.
Keywords
Cite
@article{arxiv.hep-ph/9711274,
title = {Instantons and Single Spin Asymmetries},
author = {N. I. Kochelev},
journal= {arXiv preprint arXiv:hep-ph/9711274},
year = {2007}
}
Comments
7 pages, Latex, 2 figures. To appear in Proc. Workshop ``Physics with Polarized Protons at HERA'' August 1997,DESY-Zeuthen