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Gösta Gustafson. Photo.

Gösta Gustafson

Post retirement professor

Gösta Gustafson. Photo.

Fluctuations, saturation, and diffractive excitation in high energy collisions

Author

  • Christoffer Flensburg
  • Gösta Gustafson

Summary, in English

Diffractive excitation is usually described by the Good-Walker formalism for low masses, and by the triple-Regge formalism for high masses. In the Good-Walker formalism the cross section is determined by the fluctuations in the interaction. In this paper we show that by taking the fluctuations in the BFKL ladder into account, it is possible to describe both low and high mass excitation by the Good-Walker mechanism. In high energy pp collisions the fluctuations are strongly suppressed by saturation, which implies that pomeron exchange does not factorise between DIS and pp collisions. The Dipole Cascade Model reproduces the expected triple-Regge form for the bare pomeron, and the triple-pomeron coupling is estimated.

Department/s

  • Theoretical Particle Physics

Publishing year

2010

Language

English

Publication/Series

Journal of High Energy Physics

Issue

10

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Keywords

  • QCD Phenomenology
  • Phenomenological Models

Status

Published

ISBN/ISSN/Other

  • ISSN: 1029-8479