A New Mechanism for Single Spin Asymmetries in Strong Interactions
High Energy Physics - Phenomenology
2011-04-15 v5
Abstract
It is shown that the contribution of the instantons to the fragmentation of quarks leads to the appearance of a imaginary part in diagrams of quark-quark scattering at large transfer momentum. The imaginary part comes from the analytical continuation of the instanton amplitudes from Euclidean to Minkowsky space-time and reflects quasiclassical origin of instanton solution of QCD equations of motion. This phenomenon and instanton--induced quark spin-flip give a new nonperturbative mechanism for the observed anomalous single-spin asymmetries in hadron-hadron and lepton-hadron interactions.
Keywords
Cite
@article{arxiv.hep-ph/9905497,
title = {A New Mechanism for Single Spin Asymmetries in Strong Interactions},
author = {N. I. Kochelev},
journal= {arXiv preprint arXiv:hep-ph/9905497},
year = {2011}
}
Comments
8 pages, 3 figures, Latex; final version to appear in JETP Lett