title: Two-loop Sudakov form factor in a theory with a mass gap.
authors.affiliation: Institut für Theoretische Teilchenphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany.
authors.forename: Bernd
authors.initials: B
authors.lastname: Feucht
authors.forename: Johann H
authors.initials: JH
authors.lastname: Kühn
authors.forename: Alexander A
authors.initials: AA
authors.lastname: Penin
authors.forename: Vladimir A
authors.initials: VA
authors.lastname: Smirnov