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Multiple Interactions and Saturation in High Energy Collisions

Gustafson, Gösta LU (2006) Memorial Workshop Devoted to the 75th Birthday of V N Gribov In [Host publication title missing] p.167-179
Abstract
Energy conservation is a large part of the NLO corrections to BFKL. A formalism is presented which includes effects of energy-momentum conservation in the dipole formalism in transverse coordinate space. Energy conservation gives a very strong suppression at small x, which implies that the effect of multi-pomeron exchange and saturation are pushed to very small x-values or very high energies. Perturbative QCD and PDFs from HERA can describe jets and Et-flow in high energy pp collisions, but the multiplicity distributions are much more sensitive to non-perturbative effects. Analyses of minimum bias and underlying events show that colours appear to combine to give strings which are as short as possible, in a way very different from e+e-... (More)
Energy conservation is a large part of the NLO corrections to BFKL. A formalism is presented which includes effects of energy-momentum conservation in the dipole formalism in transverse coordinate space. Energy conservation gives a very strong suppression at small x, which implies that the effect of multi-pomeron exchange and saturation are pushed to very small x-values or very high energies. Perturbative QCD and PDFs from HERA can describe jets and Et-flow in high energy pp collisions, but the multiplicity distributions are much more sensitive to non-perturbative effects. Analyses of minimum bias and underlying events show that colours appear to combine to give strings which are as short as possible, in a way very different from e+e- annihilation. This leads to important questions about the properties of the pomeron, the relation between high multiplicity events and diffraction, and the applicability of the AGK cutting rules. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
[Host publication title missing]
editor
Dokshitzer, Yu. L.; Lévai, P. and Nyíri, J.
pages
167 - 179
publisher
World Scientific
conference name
Memorial Workshop Devoted to the 75th Birthday of V N Gribov
external identifiers
  • Scopus:84894461648
ISBN
981-256-756-9
language
English
LU publication?
no
id
bb39d891-682b-4f58-a979-b1aa393f2899 (old id 745793)
date added to LUP
2007-12-18 15:23:21
date last changed
2016-10-13 04:38:01
@misc{bb39d891-682b-4f58-a979-b1aa393f2899,
  abstract     = {Energy conservation is a large part of the NLO corrections to BFKL. A formalism is presented which includes effects of energy-momentum conservation in the dipole formalism in transverse coordinate space. Energy conservation gives a very strong suppression at small x, which implies that the effect of multi-pomeron exchange and saturation are pushed to very small x-values or very high energies. Perturbative QCD and PDFs from HERA can describe jets and Et-flow in high energy pp collisions, but the multiplicity distributions are much more sensitive to non-perturbative effects. Analyses of minimum bias and underlying events show that colours appear to combine to give strings which are as short as possible, in a way very different from e+e- annihilation. This leads to important questions about the properties of the pomeron, the relation between high multiplicity events and diffraction, and the applicability of the AGK cutting rules.},
  author       = {Gustafson, Gösta},
  editor       = {Dokshitzer, Yu. L. and Lévai, P. and Nyíri, J.},
  isbn         = {981-256-756-9},
  language     = {eng},
  pages        = {167--179},
  publisher    = {ARRAY(0xbb2ee40)},
  series       = {[Host publication title missing]},
  title        = {Multiple Interactions and Saturation in High Energy Collisions},
  year         = {2006},
}