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Adding quark spin effects to PYTHIA string fragmentation

Kerbizi, Albi LU and Lönnblad, Leif LU orcid (2022) 41st International Conference on High Energy Physics, ICHEP 2022 414.
Abstract

Quark spin effects in hadronization have been recently included in the PYTHIA 8 event generator for the simulation of the deep inelastic scattering (DIS) process off a polarized nucleon target via the external StringSpinner package. The spin effects can be simulated for the production of pseudoscalar mesons using the string+3P0 model of polarized quark fragmentation and parametrizations of the transversity PDFs. We present here a major development of StringSpinner which includes the production of vector mesons in the polarized PYTHIA 8 string fragmentation as well as their polarized decays. The package is validated and used to simulate the transverse-spin asymmetries in semi-inclusive DIS (SIDIS). The simulation... (More)

Quark spin effects in hadronization have been recently included in the PYTHIA 8 event generator for the simulation of the deep inelastic scattering (DIS) process off a polarized nucleon target via the external StringSpinner package. The spin effects can be simulated for the production of pseudoscalar mesons using the string+3P0 model of polarized quark fragmentation and parametrizations of the transversity PDFs. We present here a major development of StringSpinner which includes the production of vector mesons in the polarized PYTHIA 8 string fragmentation as well as their polarized decays. The package is validated and used to simulate the transverse-spin asymmetries in semi-inclusive DIS (SIDIS). The simulation results on the Collins and dihadron asymmetries for the final state mesons are compared with the asymmetries measured in SIDIS off transversely polarized protons. Also shown are the predictions for the Collins asymmetries for p mesons produced in SIDIS off transversely polarized protons.

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type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Proceedings of Science
volume
414
article number
831
publisher
Sissa Medialab srl
conference name
41st International Conference on High Energy Physics, ICHEP 2022
conference location
Bologna, Italy
conference dates
2022-07-06 - 2022-07-13
external identifiers
  • scopus:85149909093
language
English
LU publication?
yes
id
fb6eae42-d947-4a71-8b11-0ef8bb6c5fac
date added to LUP
2023-04-04 11:08:23
date last changed
2023-04-04 11:22:44
@inproceedings{fb6eae42-d947-4a71-8b11-0ef8bb6c5fac,
  abstract     = {{<p>Quark spin effects in hadronization have been recently included in the PYTHIA 8 event generator for the simulation of the deep inelastic scattering (DIS) process off a polarized nucleon target via the external StringSpinner package. The spin effects can be simulated for the production of pseudoscalar mesons using the string+<sup>3</sup>P<sub>0</sub> model of polarized quark fragmentation and parametrizations of the transversity PDFs. We present here a major development of StringSpinner which includes the production of vector mesons in the polarized PYTHIA 8 string fragmentation as well as their polarized decays. The package is validated and used to simulate the transverse-spin asymmetries in semi-inclusive DIS (SIDIS). The simulation results on the Collins and dihadron asymmetries for the final state mesons are compared with the asymmetries measured in SIDIS off transversely polarized protons. Also shown are the predictions for the Collins asymmetries for p mesons produced in SIDIS off transversely polarized protons.</p>}},
  author       = {{Kerbizi, Albi and Lönnblad, Leif}},
  booktitle    = {{Proceedings of Science}},
  language     = {{eng}},
  publisher    = {{Sissa Medialab srl}},
  title        = {{Adding quark spin effects to PYTHIA string fragmentation}},
  volume       = {{414}},
  year         = {{2022}},
}