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Picture of Christian Bierlich

Christian Bierlich

Researcher

Picture of Christian Bierlich

Effects of overlapping strings in pp collisions

Author

  • Christian Bierlich
  • Gösta Gustafson
  • Leif Lönnblad
  • Andrey Tarasov

Summary, in English

In models for hadron collisions based on string hadronization, the strings are usually treated as independent, allowing no interaction between the confined colour fields. In studies of nucleus collisions it has been suggested that strings close in space can fuse to form "colour ropes". Such ropes are expected to give more strange particles and baryons, which also has been suggested as a signal for plasma formation. Overlapping strings can also be expected in pp collisions, where usually no phase transition is expected. In particular at the high LHC energies the expected density of strings is quite high. To investigate possible effects of rope formation, we present a model in which strings are allowed to combine into higher multiplets, giving rise to increased production of baryons and strangeness, or recombine into singlet structures and vanish. Also a crude model for strings recombining into junction structures is considered, again giving rise to increased baryon production. The models are implemented in the dipsy MC event generator, using Pythia8 for hadronization, and comparison to pp minimum bias data, reveals improvement in the description of identified particle spectra.

Department/s

  • Theoretical Particle Physics

Publishing year

2015

Language

English

Publication/Series

Journal of High Energy Physics

Issue

3

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Keywords

  • QCD Phenomenology
  • Monte Carlo Simulations

Status

Published

Project

  • Soft inclusive models for proton and nuclei collisions

ISBN/ISSN/Other

  • ISSN: 1029-8479