Predictions for Neutrinos and New Physics from Forward Heavy Hadron Production at the LHC

Abstract

Scenarios with new physics particles feebly interacting with the Standard Model sector provide compelling candidates for dark matter searches. Geared with a set of new experiments for the detection of neutrinos and long-lived particles the Large Hadron Collider (LHC) has joined the hunt for these elusive states. On the theoretical side, this emerging physics program requires reliable estimates of the associated particle fluxes, in particular those arising from heavy hadron decays. In this work, we provide state-of-the-art QCD predictions for heavy hadron production including radiative corrections at next-to-leading order and using parton distribution functions including small-$x$ resummation at next-to-leading logarithmic accuracy. We match our predictions to parton showers to provide a realistic description of hadronisation effects. We demonstrate the utility of our predictions by presenting the energy spectrum of neutrinos from charm hadron decays. Furthermore, we employ our predictions to estimate, for the first time, FASER's sensitivity to electrophilic ALPs, which are predominantly generated in beauty hadron decays.

12 pages, 8 figures. Version published in EPJC

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• Discovering neutrino tridents at the Large Hadron Collider
• A Phenomenological Analysis of LHC Neutrino Scattering at NLO Accuracy Matched to Parton Showers
• Leptophilic Axion-like Particles at Forward Detectors
• Neutrino Experiments at the Large Hadron Collider
• Deep-Inelastic Scattering at TeV Energies with LHC Muons
• Detecting LHC Neutrinos at Surface Level
• Searching for long-lived light neutralinos and axionlike particles at the SHiNESS experiment
• Letter of Intent: The Forward Physics Facility
• Probing a $Z^{\prime }$ gauge boson via neutrino trident scattering in the Forward Physics Facility at the LHC and FCC
• Investigating nuclear effects in lepton-ion DIS at the LHC
• Predictions for dimuon production in high-energy neutrino-proton collisions using the color dipole model