Perturbative charm production and the prompt atmospheric neutrino flux in light of RHIC and LHC
Atri Bhattacharya, Rikard Enberg, Mary Hall Reno, Ina Sarcevic and, Anna Stasto
TL;DR
This paper recalculates the prompt atmospheric neutrino flux using recent collider data, leading to lower estimates that impact IceCube neutrino observations and background analysis.
Contribution
It introduces a re-evaluation of the prompt neutrino flux with updated QCD parameters constrained by RHIC and LHC data, refining previous estimates.
Findings
Prompt neutrino flux is lower than previous estimates.
Revised flux affects IceCube signal-to-background analysis.
Updated QCD parameters improve flux predictions.
Abstract
We re-evaluate the prompt atmospheric neutrino flux, using the measured charm cross sections at RHIC and the Large Hadron Collider to constrain perturbative QCD parameters such as the factorization and renormalization scales, as well as modern parton distribution functions and recent estimates of the cosmic-ray spectra. We find that our result for the prompt neutrino flux is lower than previous perturbative QCD estimates and, consequently, alters the signal-to-background statistics of the recent IceCube measurements at high energies.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Astrophysics and Cosmic Phenomena · Computational Physics and Python Applications