Gösta Gustafson
Professor
Exclusive final states in diffractive excitation
Author
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 - Has been reorganised
Publishing year
2012
Language
English
Publication/Series
Journal of High Energy Physics
Volume
2012
Issue
12
Links
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