High Energy Neutrino Studies in the forward direction with FASER experiment at the LHC

TL;DR

The FASER experiment at the LHC investigates high-energy neutrinos and potential BSM particles by measuring neutrino interactions with a tungsten-based emulsion chamber, providing new cross-section data in the TeV energy range.

Contribution

This work presents the first measurements of neutrino cross-sections at TeV energies using FASER's emulsion detector, expanding understanding of neutrino interactions at high energies.

Findings

Measured $ u_e$ and $ u_$ cross-sections in the 100 GeV to TeV range.

Provided new data on neutrino interactions at unexplored energies.

Demonstrated FASER's capability to study high-energy neutrinos.

Abstract

The FASER experiment studies the neutral decay products from LHC collision of 13.6 TeV centre of mass energy at 480m distant away. There could be Beyond Standard Model (BSM) particles such like dark photons or axion like particles etc.., and also high energy neutrinos. The neutrino target is an Emulsion Cloud Chamber with tungsten plates who can measure all three neutrino flavours with clear separation. Recently, FASER has measured the muon and electron neutrino cross-section with a nucleon as $ \sigma(\nu_{e} + N) = 1.2^{+0.8}_{-0.7}\times 10^{-38} cm^{2}/GeV$ and $ \sigma(\nu_{\mu} + N) = 0.5 \pm{0.2}\times 10^{-38} cm^{2}/GeV$ in the unexplored energy region of a few hundred GeV to a few TeV so far.