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Gösta Gustafson. Photo.

Gösta Gustafson

Post retirement professor

Gösta Gustafson. Photo.

Multiple Scattering, Underlying Event, and Minimum Bias


  • Gösta Gustafson

Summary, in English

In this talk I first discuss the experimental evidence for multiple scattering and the properties of the underlying event. The extensive analyses by Rick Field of data from CDF cannot be reconciled with traditional wisdom concerning multiple collisions and the AGK cutting rules. Data seem to imply some kind of color recombination or unexpectedly strong effects from pomeron vertices. I then discuss theoretical ideas concerning the relation between multiple collisions and unitarity: the AGK rules, IP loops, dipole cascade models and diffraction.


  • Theoretical Particle Physics

Publishing year




Document type

Conference paper


  • Subatomic Physics

Conference name

12th International Conference on Elastic and Diffractive Scattering

Conference date

2007-05-21 - 2007-05-25