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Measuring three-flavor neutrinos with FASERnu at the LHC

by Tomoko Ariga

This is not the latest submitted version.

Submission summary

Authors (as registered SciPost users): Tomoko Ariga
Submission information
Preprint Link: scipost_202111_00052v1  (pdf)
Date submitted: 2021-11-24 01:16
Submitted by: Ariga, Tomoko
Submitted to: SciPost Physics Proceedings
Proceedings issue: 16th International Workshop on Tau Lepton Physics (TAU2021)
Ontological classification
Academic field: Physics
Specialties:
  • High-Energy Physics - Experiment
Approach: Experimental

Abstract

FASER$\nu$ 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$^{-1}$ 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 $\sim$2,000 $\nu_e$, 7,000 $\nu_{\mu}$, and 50 $\nu_{\tau}$ interactions in the detector.

Current status:
Has been resubmitted

Reports on this Submission

Report #1 by Anonymous (Referee 1) on 2022-2-17 (Invited Report)

Strengths

1 - Clarity and conciseness
2 - First neutrino events at pilot-detector
3 - Implications for the future

Report

I think this proceeding is well written and well suited for the proceeding issue "16th International Workshop on Tau Lepton Physics (TAU2021)". I would recommend publication after minor revisions below.

Requested changes

1 - "Figure 1 shows the existing constraints...". There are additional measurements with IceCube using all-flavor data. Suggest removing "the existing" and giving references to those cross section measurements (https://doi.org/10.1103/PhysRevD.104.022001, https://doi.org/10.1103/PhysRevLett.122.041101).

2 - In the last paragraph of Sec. 1 it is stated that nue mainly originate from charm decays. This is energy dependent I think, as lighter mesons dominate at lower energies. I suppose it's true for FASERnu. It might be helpful to have a breakdown of the fluxes included as a figure or in the text.

3 - Fig. 1 right panel has SK extending to higher energies than IC-DeepCore. Could these numbers be double checked? In looking at the paper SK expectations drops below 1 at around 40 GeV, where as in IC there seems to be data at that energy still.

4. Sec. 3 could use a bit more detail on the pilot-detector setup.

5 - Sec. 4 "detector is consisted" --> "detector consists"

6 - Sec. 4 "will be installed in the tunnel in November 2021." The proceeding is dated Nov. 24 2021 so I think the tense should be changed?

  • validity: top
  • significance: high
  • originality: good
  • clarity: top
  • formatting: excellent
  • grammar: excellent

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