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Profile picture of Leif Lönnblad. Photo.

Leif Lönnblad

Professor of Theoretical Physics

Profile picture of Leif Lönnblad. Photo.

Exclusive final states in diffractive excitation

Author

  • Christoffer Flensburg
  • Gösta Gustafson
  • Leif Lönnblad

Summary, in English

In this paper we describe a formalism for generating exclusive final states in diffractive excitation, based on the optical analogy where diffraction is fully determined by the absorption into inelastic channels. The formalism is based on the Good--Walker formalism for diffractive excitation, and it is assumed that the virtual parton cascades represent the diffractive eigenstates defined by a definite absorption amplitude. We emphasize that, although diffractive excitation is basically a quantum-mechanical phenomenon with strong interference effects, it is possible to calculate the different interfering components to the amplitude in an event generator, add them and thus calculate the reaction cross section for exclusive diffractive final states. The formalism is implemented in the DIPSY event generator, introducing no tunable parameters beyond what has been determined previously in studies of non-diffractive events. Some early results from DIS and proton-proton collisions are presented, and compared to experimental data.

Department/s

  • Theoretical Particle Physics

Publishing year

2012

Language

English

Publication/Series

Journal of High Energy Physics

Volume

2012

Issue

12

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Keywords

  • Diffraction
  • Small-x physics
  • Saturation
  • Dipole Model
  • DIS

Status

Published

ISBN/ISSN/Other

  • ISSN: 1029-8479