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Tuning pythia for forward physics experiments

Fieg, Max ; Kling, Felix ; Schulz, Holger and Sjöstrand, Torbjörn LU orcid (2024) In Physical Review D 109(1).
Abstract

Event generators like pythia play an important role in physics studies at the Large Hadron Collider (LHC). While they make accurate predictions in the central region, i.e., at pseudorapidities η<5, a disagreement between pythia and measurements in the forward region η>7 has been observed. We introduce a dedicated forward physics tune for the pythia event generator to be used for forward physics studies at the LHC, which uses a more flexible modeling of beam remnant hadronization and is tuned to available particle spectra measured by LHCf. Furthermore, we provide an uncertainty estimate on the new tune in a data-driven way which can be used as a means of flux uncertainty for future forward physics studies. We demonstrate an... (More)

Event generators like pythia play an important role in physics studies at the Large Hadron Collider (LHC). While they make accurate predictions in the central region, i.e., at pseudorapidities η<5, a disagreement between pythia and measurements in the forward region η>7 has been observed. We introduce a dedicated forward physics tune for the pythia event generator to be used for forward physics studies at the LHC, which uses a more flexible modeling of beam remnant hadronization and is tuned to available particle spectra measured by LHCf. Furthermore, we provide an uncertainty estimate on the new tune in a data-driven way which can be used as a means of flux uncertainty for future forward physics studies. We demonstrate an application of our tune by showing the updated neutrino and dark photon spectra at the FASER experiment.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review D
volume
109
issue
1
article number
016010
publisher
American Physical Society
external identifiers
  • scopus:85182369016
ISSN
2470-0010
DOI
10.1103/PhysRevD.109.016010
language
English
LU publication?
yes
id
ed5549c7-fbcc-4970-9e5b-b2cb6c3ddf2b
date added to LUP
2024-02-16 12:27:07
date last changed
2024-02-16 12:28:31
@article{ed5549c7-fbcc-4970-9e5b-b2cb6c3ddf2b,
  abstract     = {{<p>Event generators like pythia play an important role in physics studies at the Large Hadron Collider (LHC). While they make accurate predictions in the central region, i.e., at pseudorapidities η&lt;5, a disagreement between pythia and measurements in the forward region η&gt;7 has been observed. We introduce a dedicated forward physics tune for the pythia event generator to be used for forward physics studies at the LHC, which uses a more flexible modeling of beam remnant hadronization and is tuned to available particle spectra measured by LHCf. Furthermore, we provide an uncertainty estimate on the new tune in a data-driven way which can be used as a means of flux uncertainty for future forward physics studies. We demonstrate an application of our tune by showing the updated neutrino and dark photon spectra at the FASER experiment.</p>}},
  author       = {{Fieg, Max and Kling, Felix and Schulz, Holger and Sjöstrand, Torbjörn}},
  issn         = {{2470-0010}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review D}},
  title        = {{Tuning pythia for forward physics experiments}},
  url          = {{http://dx.doi.org/10.1103/PhysRevD.109.016010}},
  doi          = {{10.1103/PhysRevD.109.016010}},
  volume       = {{109}},
  year         = {{2024}},
}