Preprint

PUBDB-2023-05595

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

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Please use a persistent id in citations: doi:10.3204/PUBDB-2023-05595

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 $\eta<5$, a disagreement between Pythia and measurements in the forward region, $\eta>7$, 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 modelling 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): particle, spectrum ; photon, spectrum ; CERN LHC Coll ; Monte Carlo ; LHC-F ; flux ; hadronization ; rapidity ; central region

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:
; ; Published

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Fieg, M. (Corresponding author) ; Kling, F.DESY* ; Schulz, H. ; Sjöstrand, T.
Tuning pythia for forward physics experiments
Physical review / D 109(1), 016010 (2023) [10.1103/PhysRevD.109.016010]2023     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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