Relevance of ultra-soft gluons and kt resummation for total cross-sections

Abstract

Inclusion of down to zero-momentum gluons and their k_t resummation is shown to quench the too fast rise of the mini jet cross section and thereby obtain realistic total cross-sections.

6 pages, 2figures, Presented at FLAVIAnet Workshop, Kazimierz, 23-27 July, 2009. Correction of formula (9) with a factor πin the denominator and further minor corrections to the text