ar X iv : h ep - p h / 97 11 27 4 v 1 1 0 N ov 1 99 7 Instantons and Single Spin Asymmetries
نویسنده
چکیده
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.
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