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Exclusive final states in diffractive excitation

Flensburg, Christoffer LU ; Gustafson, Gösta LU and Lönnblad, Leif LU (2012) In Journal of High Energy Physics
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
submitted
subject
keywords
Diffraction, Small-x physics, Saturation, Dipole Model, DIS
in
Journal of High Energy Physics
publisher
Springer
external identifiers
  • WOS:000313124000050
ISSN
1126-6708
language
English
LU publication?
yes
id
3da42839-c3ac-4c9c-9f3e-45afaf3a456b (old id 3168655)
alternative location
http://arxiv.org/pdf/1210.2407.pdf
date added to LUP
2012-11-16 16:36:26
date last changed
2016-04-16 11:25:50
@misc{3da42839-c3ac-4c9c-9f3e-45afaf3a456b,
  abstract     = {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.},
  author       = {Flensburg, Christoffer and Gustafson, Gösta and Lönnblad, Leif},
  issn         = {1126-6708},
  keyword      = {Diffraction,Small-x physics,Saturation,Dipole Model,DIS},
  language     = {eng},
  publisher    = {ARRAY(0xafd4030)},
  series       = {Journal of High Energy Physics},
  title        = {Exclusive final states in diffractive excitation},
  year         = {2012},
}