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Tuning Pythia for Forward Physics Experiments

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arxiv 2309.08604 v1 pith:FNYTXUMK submitted 2023-09-15 hep-ph

Tuning Pythia for Forward Physics Experiments

classification hep-ph
keywords forwardphysicspythiastudiestuneeventregionspectra
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER

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    First differential measurement of muon neutrino-nucleon cross section and flux in six TeV-scale energy bins using FASER at the LHC, with results consistent with Standard Model expectations.

  2. A New Source of Millicharged Particles: Secondary Showers in the LHC Forward Absorber

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    Secondary cascades in the TAXN absorber produce a substantial millicharged particle flux that complements primary production and boosts FORMOSA signals by ~50% for m_χ below 0.1 GeV.

  3. The Single Photon Signature of a Light Long-lived Neutralino at Remote Detectors at the LHC

    hep-ph 2026-05 unverdicted novelty 5.0

    ANUBIS offers the highest projected sensitivity for detecting single-photon signatures from long-lived neutralinos at the LHC among several remote detector proposals, based on six benchmark scenarios.

  4. Letter of Intent: The Forward Physics Facility

    hep-ex 2025-10 unverdicted novelty 5.0

    Proposes construction of the Forward Physics Facility at the HL-LHC with four complementary detectors to exploit forward neutrinos and new-particle fluxes for neutrino, QCD, astroparticle, and dark-matter measurements.