The atmospheric neutrino muon-like fraction above 1 GeV

Journal Article · Tue May 20 04:00:00 EDT 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.54393· OSTI ID:21175509

Clark, R ^[1]

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1. Louisiana State University, Baton Rouge, Louisiana 70803 (United States)

A total of 72 atmospheric neutrino events were found in a 2.1 kton-yr exposure of data from the Irvine-Michigan-Brookhaven detector. Each event had a vertex contained inside the fiducial volume and at least 0.95 GeV of visible Cerenkov energy. The ratio of ratios: f=(muon-like/total){sub Data}/(muon-like/total){sub MC}, was found to be 1.1{sub -0.12}{sup +0.07}(stat.){+-}0.11(syst.). The zenith angle dependence of f is consistent with being flat. The regions of sin{sup 2}(2{theta})>0.5, {delta}m{sup 2}>9.8x10{sup -3}eV{sup 2} and sin{sup 2}(2{theta})>0.7, {delta}m{sup 2}>1.5x10{sup -2}eV{sup 2} have been excluded to the 90% confidence level for {nu}{sub {mu}}{yields}{nu}{sub c} and {nu}{sub {mu}}{yields}{nu}{sub {tau}} oscillations respectively.

• OSTI ID: 21175509
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 412; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
CHERENKOV COUNTERS
GEV RANGE
MULTIPARTICLE SPECTROMETERS
MUON NEUTRINOS
MUONS
NEUTRINO DETECTION
NEUTRINO OSCILLATION
PARTICLE IDENTIFICATION
TAU NEUTRINOS
WEINBERG ANGLE