Measuring three-flavor neutrinos with FASER$\nu$ at the LHC

• Published in: SciPost physics proceedings no. 16; p. 028
• Main Author: Ariga, Tomoko
• Format: Journal Article
• Language: English
• Published: SciPost 15.07.2025
• ISSN: 2666-4003; 2666-4003
• DOI: 10.21468/SciPostPhysProc.16.028

FASER \nu ν at the Large Hadron Collider (LHC) is designed to directly detect neutrinos from a collider for the first time and study their cross sections at TeV energies. To date, no such measurements have been made. In 2018, a pilot detector was installed and collected proton-proton collision data of 12.2 fb ^{-1} − 1 at a center-of-mass energy of 13 TeV. We observed the first neutrino interaction candidates at the LHC, opening a new avenue for studying neutrinos from current and future high-energy colliders. During Run 3 of the LHC from 2022, we will deploy a neutrino detector with a target mass of 1.1 tons. We expect to collect $$2,000 \nu_e ν e , 6,000 \nu_{\mu} ν μ , and 40 \nu_{\tau} ν τ interactions in the detector.