This letter presents the measurement of the energy-dependent neutrino-nucleon cross section in tungsten and the differential flux of muon neutrinos and anti-neutrinos. The analysis is performed using proton-proton collision data at a center-of-mass energy of $13.6 \, {\rm TeV}$ and corresponding to an integrated luminosity of $(65.6 \pm 1.4) \, \mathrm{fb^{-1}}$. Using the active electronic components of the FASER detector, $338.1 \pm 21.0$ charged current muon neutrino interaction events are identified, with backgrounds from other processes subtracted. We unfold the neutrino events into a fiducial volume corresponding to the sensitive regions of the FASER detector and interpret the results in two ways: We use the expected neutrino flux to measure the cross section, and we use the predicted cross section to measure the neutrino flux. Both results are presented in six bins of neutrino energy, achieving the first differential measurement in the TeV range. The observed distributions align with Standard Model predictions. Using this differential data, we extract the contributions of neutrinos from pion and kaon decays.
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FASER
Collaboration
(2025).
First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER. Phys.Rev.Lett. 134 (2025) 211801.
First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER. HEPData (collection).
https://doi.org/10.17182/hepdata.156838
or, if you prefer, a specific version of the
record:
FASER
Collaboration
(2025).
First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER (Version 1). HEPData (collection).
https://doi.org/10.17182/hepdata.156838.v1
You can also cite the 32 data
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FASER
Collaboration
(2025).
“fig_1_numu_systematic_uncertainties” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t1
FASER
Collaboration
(2025).
“fig_1_numubar_systematic_uncertainties” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t2
FASER
Collaboration
(2025).
“fig_1_nu_numubar_systematic_uncertainties” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t3
FASER
Collaboration
(2025).
“fig_1_numu_relative_systematic_uncertainties” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t4
FASER
Collaboration
(2025).
“fig_1_numubar_relative_systematic_uncertainties” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t5
FASER
Collaboration
(2025).
“fig_1_nu_numubar_relative_systematic_uncertainties” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t6
FASER
Collaboration
(2025).
“fig_2_top_observed_neutrino_candidates” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t7
FASER
Collaboration
(2025).
“fig_2_top_observed_neutrino_candidates_per_inv_bin_width” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t8
FASER
Collaboration
(2025).
“fig_2_bottom_neutrino_interactions” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t9
FASER
Collaboration
(2025).
“fig_2_bottom_numu_neutrino_interactions_per_bin_width” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t10
FASER
Collaboration
(2025).
“fig_2_bottom_numubar_neutrino_interactions_per_bin_width” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t11
FASER
Collaboration
(2025).
“fig_2_bottom_numu_numubar_neutrino_interactions_per_bin_width” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t12
FASER
Collaboration
(2025).
“fig_3_top_numu_cross_section” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t13
FASER
Collaboration
(2025).
“fig_3_top_numubar_cross_section” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t14
FASER
Collaboration
(2025).
“fig_3_top_numu_numubar_cross_section” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t15
FASER
Collaboration
(2025).
“fig_3_top_numu_cross_section_over_energy” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t16
FASER
Collaboration
(2025).
“fig_3_top_numubar_cross_section_over_energy” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t17
FASER
Collaboration
(2025).
“fig_3_top_numu_numubar_cross_section_over_energy” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t18
FASER
Collaboration
(2025).
“fig_3_bottom_numu_flux” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t19
FASER
Collaboration
(2025).
“fig_3_bottom_numubar_flux” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t20
FASER
Collaboration
(2025).
“fig_3_bottom_numu_numubar_flux” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t21
FASER
Collaboration
(2025).
“fig_3_bottom_numu_flux_per_bin_width” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t22
FASER
Collaboration
(2025).
“fig_3_bottom_numubar_flux_per_bin_width” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t23
FASER
Collaboration
(2025).
“fig_3_bottom_numu_numubar_flux_per_bin_width” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t24
FASER
Collaboration
(2025).
“fig_4_num_nu_production_modes” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t25
FASER
Collaboration
(2025).
“fig_4_covariance_matrix” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t26
FASER
Collaboration
(2025).
“fig_6_response_matrix” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t27
FASER
Collaboration
(2025).
“fig_7_left_number_ift_clusters” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t28
FASER
Collaboration
(2025).
“fig_7_center_theta” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t29
FASER
Collaboration
(2025).
“fig_7_right_qop” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t30
FASER
Collaboration
(2025).
“table_2_efficiency” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t31
FASER
Collaboration
(2025).
“covariance_matrix” of “First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.156838.v1/t32
When using this data, please cite the original publication:
FASER
Collaboration
(2025).
First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER. Phys.Rev.Lett. 134 (2025) 211801.
or, if you prefer, a specific version of the
record:
You can also cite the 32 data
tables
individually.
Data tables
Choose table:
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