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Simulation of e+e− annihilation with quark spin effects

Kerbizi, A. LU ; Lönnblad, L. LU orcid and Martin, A. (2024) 25th International Symposium on Spin Physics, SPIN 2023 456.
Abstract

The quark spin effects are introduced for the first time in the string fragmentation routine of the Pythia 8 Monte Carlo event generator for the simulation of e+e− annihilation to hadrons. To describe the spin effects the string+3P0 model of polarized hadronization with emissions of pseudoscalar and vector mesons is used. The spin effects are activated in the generator by extending the StringSpinner package, previously applied to the simulation of deep inelastic scattering off a polarized nucleon. The generator is used to carry out simulations of e+e− annihilation at the center of mass energy of 10.6 GeV. The Collins asymmetry for back-to-back pion pairs is evaluated and... (More)

The quark spin effects are introduced for the first time in the string fragmentation routine of the Pythia 8 Monte Carlo event generator for the simulation of e+e− annihilation to hadrons. To describe the spin effects the string+3P0 model of polarized hadronization with emissions of pseudoscalar and vector mesons is used. The spin effects are activated in the generator by extending the StringSpinner package, previously applied to the simulation of deep inelastic scattering off a polarized nucleon. The generator is used to carry out simulations of e+e− annihilation at the center of mass energy of 10.6 GeV. The Collins asymmetry for back-to-back pion pairs is evaluated and compared to the asymmetry as measured by the BELLE experiment. A satisfactory agreement is found.

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author
; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Proceedings of Science
volume
456
article number
056
publisher
Sissa Medialab srl
conference name
25th International Symposium on Spin Physics, SPIN 2023
conference location
Durham, United States
conference dates
2023-09-24 - 2023-09-29
external identifiers
  • scopus:85200447983
language
English
LU publication?
yes
id
ce95801d-b14a-4ca1-8f2b-c7c49aa4dedd
date added to LUP
2024-09-23 13:34:53
date last changed
2024-09-23 13:35:22
@inproceedings{ce95801d-b14a-4ca1-8f2b-c7c49aa4dedd,
  abstract     = {{<p>The quark spin effects are introduced for the first time in the string fragmentation routine of the Pythia 8 Monte Carlo event generator for the simulation of e<sup>+</sup>e<sup>−</sup> annihilation to hadrons. To describe the spin effects the string+<sup>3</sup>P<sub>0</sub> model of polarized hadronization with emissions of pseudoscalar and vector mesons is used. The spin effects are activated in the generator by extending the StringSpinner package, previously applied to the simulation of deep inelastic scattering off a polarized nucleon. The generator is used to carry out simulations of e<sup>+</sup>e<sup>−</sup> annihilation at the center of mass energy of 10.6 GeV. The Collins asymmetry for back-to-back pion pairs is evaluated and compared to the asymmetry as measured by the BELLE experiment. A satisfactory agreement is found.</p>}},
  author       = {{Kerbizi, A. and Lönnblad, L. and Martin, A.}},
  booktitle    = {{Proceedings of Science}},
  language     = {{eng}},
  publisher    = {{Sissa Medialab srl}},
  title        = {{Simulation of e<sup>+</sup>e<sup>−</sup> annihilation with quark spin effects}},
  volume       = {{456}},
  year         = {{2024}},
}