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.
Extracting the Energy-Dependent Neutrino-Nucleon Cross Section Above 10 TeV Using IceCube Showers
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abstract
Neutrinos are key to probing the deep structure of matter and the high-energy Universe. Yet, until recently, their interactions had only been measured at laboratory energies up to about 350 GeV. An opportunity to measure their interactions at higher energies opened up with the detection of high-energy neutrinos in IceCube, partially of astrophysical origin. Scattering off matter inside the Earth affects the distribution of their arrival directions --- from this, we extract the neutrino-nucleon cross section at energies from 18 TeV to 2 PeV, in four energy bins, in spite of uncertainties in the neutrino flux. Using six years of public IceCube High-Energy Starting Events, we explicitly show for the first time that the energy dependence of the cross section above 18 TeV agrees with the predicted softer-than-linear dependence, and reaffirm the absence of new physics that would make the cross section rise sharply, up to a center-of-mass energy of ~1 TeV.
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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.
High-energy astrophysical neutrinos enable stringent tests of physics beyond the Standard Model at energies and baselines unreachable by other means.
citing papers explorer
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First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER
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.
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Letter of Intent: The Forward Physics Facility
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.
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Fundamental physics with high-energy cosmic neutrinos today and in the future
High-energy astrophysical neutrinos enable stringent tests of physics beyond the Standard Model at energies and baselines unreachable by other means.