A positivity bound for the longitudinal gluon distribution in a nucleon

Abstract

The distribution of longitudinal gluons in a nucleon, introduced earlier by Gorsky and Ioffe, is estimated from below by making use of the positivity of density matrix and the analogue of the Wandzura-Wilczek relation for the light-cone distributions of polarized gluons in a transversely polarized nucleon.

Comments: LATEX, 5 pages, Preprint CPT-97-P.3550