Intrinsic $k_{\perp }$ in the pomeron

Abstract

In a consistent QCD approach to diffractive DIS gluons in the pomeron have soft $z_g$ distribution and very broad intrinsic $k_{\perp }$ distribution. The latter has not yet been incorporated into diffractive Monte-Carlo generators (RAPGAP,....). I argue that the so-introduced bias in the diffractive jet analysis may be the reason why H1 Collaboration finds the very large and hard gluon content of the pomeron. I discuss possible direct experimental determinations of intrinsic $k_{\perp }$ in the pomeron.

Comments: 5 pages, to appear in Proceedings of Workshop on Monte Carlo at HERA, DESY. Extended discussion of QCD mechanism of Diffractive DIS added in the Introduction