Journal Article

PUBDB-2023-05602

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tuning pythia for forward physics experiments

Fieg, M. (Corresponding author) ; Kling, F.DESY* ; Schulz, H. ; Sjöstrand, T.

2023
American Physical Society Ridge, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevD.109.016010  doi:10.3204/PUBDB-2023-05602

Report No.: DESY-23-133; arXiv:2309.08604

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 application of our tune by showing the updated neutrino and dark photon spectra at the FASER experiment.

Keyword(s): PYTHIA ; particle: spectrum ; photon: spectrum ; neutrino: spectrum ; CERN LHC Coll ; Monte Carlo ; LHC-F ; flux ; hadronization ; rapidity ; central region ; forward production

Note: We will first submit to arXiv, and later also to a journal.

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project 390833306 - EXC 2121: Quantum Universe (390833306) (390833306)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2023

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Database coverage:
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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Fieg, M. (Corresponding author) ; Kling, F.DESY* ; Schulz, H. ; Sjöstrand, T.
Tuning Pythia for Forward Physics Experiments
[10.3204/PUBDB-2023-05595]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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