Instantons and Single Spin Asymmetries
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.
- Publication:
-
arXiv e-prints
- Pub Date:
- November 1997
- DOI:
- 10.48550/arXiv.hep-ph/9711274
- arXiv:
- arXiv:hep-ph/9711274
- Bibcode:
- 1997hep.ph...11274K
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 7 pages, Latex, 2 figures. To appear in Proc. Workshop ``Physics with Polarized Protons at HERA'' August 1997,DESY-Zeuthen