Methods and stability tests associated with the sterile neutrino search using improved high-energy <math display="inline"><msub><mi>ν</mi><mi>μ</mi></msub></math> event reconstruction in IceCube - INSPIRE

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Methods and stability tests associated with the sterile neutrino search using improved high-energy $ν_{μ}$ event reconstruction in IceCube

Collaborations

May 13, 2024

19 pages

Published in:

Phys.Rev.D 110 (2024) 9, 092009

Published: Nov 1, 2024

e-Print:

2405.08077 [hep-ex]

DOI:

10.1103/PhysRevD.110.092009 (publication)

Experiments:

ICECUBE

View in:

ADS Abstract Service

reference search6 citations

Citations per year

Abstract: (APS)

We provide supporting details for the search for a

3 + 1

sterile neutrino using data collected over 10.7 years at the IceCube Neutrino Observatory. The analysis uses atmospheric muon-flavored neutrinos from 0.5 to 100 TeV that traverse Earth to reach the IceCube detector and finds a best-fit point at

\sin^{2} (2 θ_{24}) = 0.16

and

Δ m_{41}^{2} = 3.5 {eV}^{2}

with a goodness-of-fit p value of 12% and consistency with the null hypothesis of no oscillations to sterile neutrinos with a p value of 3.1%. Several improvements were made over past analyses, which are reviewed in this article, including upgrades to the reconstruction and the study of sources of systematic uncertainty. We provide details of the fit quality and discuss stability tests that split the data for separate samples, comparing results. We find that the fits are consistent between split datasets.

Note:

19 pages, 19 figures, 2 tables. This long-form paper is a companion to the letter "A search for an eV-scale sterile neutrino using improved high-energy νμ event reconstruction in IceCube." Matches published version

neutrino: sterile
IceCube
stability
upgrade
neutrino: oscillation
neutrino: mixing angle
neutrino: mass difference
neutrino/mu: interaction
neutrino/mu: atmosphere
neutrino/mu: flux

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