title: Hard to soft pomeron transition in small-x deep inelastic scattering data using optimal renormalization.
abstract: We show that it is possible to describe the effective Pomeron intercept, determined from the HERA deep inelastic scattering data at small values of Bjorken x, by using next-to-leading order Balitsky-Fadin-Kuraev-Lipatov evolution together with collinear improvements. To obtain a good description over the whole range of Q(2), we use a non-Abelian physical renormalization scheme with the Brodsky-Lepage-Mackenzie optimal scale, combined with a parametrization of the running coupling in the infrared region.
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: Martin
authors.initials: M
authors.lastname: Hentschinski
authors.affiliation: Instituto de Física Teórica UAM/CSIC and Universidad Autónoma de Madrid, E-28049 Madrid, Spain and Physics Department, CERN, CH-1211 Genéve 23, Switzerland.
authors.forename: Agustín Sabio
authors.initials: AS
authors.lastname: Vera
authors.affiliation: Instituto de Física Teórica UAM/CSIC and Universidad Autónoma de Madrid, E-28049 Madrid, Spain and Physics Department, CERN, CH-1211 Genéve 23, Switzerland.
authors.forename: Clara
authors.initials: C
authors.lastname: Salas