Testing saturation with large-mass diffraction in DIS

Abstract

In large-mass diffraction in deep inelastic scattering, we study the gluon jet close to the rapidity gap and show that its transverse momentum spectrum is peaked around a value which caracterizes the onset of S-matrix unitarity. We argue that such a measurement of diffractive jets could help understanding if at the present energies, unitarity comes as a consequence of saturation.

Comments: 4 pages, 3 figures, Proceedings of the XIth International Conference on Elastic and Diffractive Scattering (EDS05), Blois, France, May 15-20 2005