Forward neutrinos from charm at the Large Hadron Collider

Atri Bhattacharya, Felix Kling, Ina Sarcevic, Anna M. Stasto

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The currently operating FASER experiment and the planned Forward Physics Facility (FPF) will detect a large number of neutrinos produced in proton-proton collisions at the LHC. In this work, we estimate neutrino fluxes at these detectors from charm meson decays, which will be particularly important for the νe and ντ channels. We make prediction using both the next-to-leading order collinear factorization and the kT-factorization approaches to model the production of charm quarks as well as different schemes to model their hadronization into charm hadrons. In particular, we emphasize that a sophisticated modeling of hadronization involving beam remnants is needed for predictions at FASER and FPF due to the sensitivity to the charm hadron production at low transverse momenta and very forward rapidity. As example, we use the string fragmentation approach implemented in pythia 8. While both standard fragmentation functions and pythia 8 are able to describe LHCb data, we find that pythia 8 predicts significantly higher rate of high energy neutrinos, highlighting the importance of using the correct hadronization model when making predictions.

Original languageEnglish (US)
Article number014040
JournalPhysical Review D
Volume109
Issue number1
DOIs
StatePublished - Jan 1 2024

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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