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Journal article
Measurement of the atmospheric neutrino-induced upgoing muon flux using MACRO
Physics letters. B, v 434(3), pp 451-457
1998
Abstract
We present a measurement of the flux of neutrino-induced upgoing muons (<E
ν
>∼ 100 GeV) using the MACRO detector. The ratio of the number of observed to expected events integrated over all zenith angles is 0.74 ±0.036 (stat) ±0.046 (systematic) ±0.13 (theoretical). The observed zenith distribution for −1.0≤cos
θ≤−0.1 does not fit well with the no oscillation expectation, giving a maximum probability for
χ
2 of 0.1%. The acceptance of the detector has been extensively studied using downgoing muons, independent analyses and Monte Carlo simulations. The other systematic uncertainties cannot be the source of the discrepancies between the data and expectations.
We have investigated whether the observed number of events and the shape of the zenith distribution can be explained by a neutrino oscillation hypothesis. Fitting either the flux or zenith distribution independently yields mixing parameters of sin
22
θ=1.0 and
Δm
2 of a few times 10
−3 eV
2. However, the observed zenith distribution does not fit well with any expectations, giving a maximum probability for
χ
2 of 5% for the best oscillation hypothesis, and the combined probability for the shape and number of events is 17%. We conclude that these data favor a neutrino oscillation hypothesis, but with unexplained structure in the zenith distribution not easily explained by either the statistics or systematics of the experiment.
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Details
- Title
- Measurement of the atmospheric neutrino-induced upgoing muon flux using MACRO
- Creators
- M Ambrosio - University of Naples Federico IIR Antolini - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), ItalyC Aramo - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), ItalyG Auriemma - University of BasilicataA Baldini - University of PisaG C. Barbarino - Dipartimento di Fisica dell'Università di Napoli and INFN, 80125 Napoli, ItalyB C. Barish - California Institute of Technology, Pasadena, CA 91125, USAG Battistoni - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), ItalyR Bellotti - University of Bari Aldo MoroC Bemporad - University of PisaP Bernardini - University of SalentoH Bilokon - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), ItalyV Bisi - University of TurinC Bloise - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), ItalyC Bower - Indiana UniversityS Bussino - Dipartimento di Fisica dell'Università di Roma “La Sapienza" and INFN, 00185 Roma, ItalyF Cafagna - University of Bari Aldo MoroM Calicchio - University of Bari Aldo MoroD Campana - University of Naples Federico IIM Carboni - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), ItalyM Castellano - University of Bari Aldo MoroS Cecchini - University of BolognaF Cei - University of Michigan–Ann ArborV Chiarella - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), ItalyB.C Choudhary - California Institute of TechnologyS Coutu - Department of Physics, University of Michigan, Ann Arbor, MI 48109, USAL De Benedictis - University of Bari Aldo MoroG De Cataldo - University of Bari Aldo MoroH Dekhissi - University of BolognaC De Marzo - University of Bari Aldo MoroI De Mitri - University of L'AquilaJ Derkaoui - University of BolognaM De Vincenzi - Roma Tre UniversityA Di Credico - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), ItalyO Erriquez - University of Bari Aldo MoroC Favuzzi - University of Bari Aldo MoroC Forti - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), ItalyP Fusco - University of Bari Aldo MoroG Giacomelli - University of BolognaG Giannini - University of PisaN Giglietto - University of Bari Aldo MoroM Giorgini - University of BolognaM Grassi - University of PisaL Gray - California Institute of TechnologyA Grillo - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), ItalyF Guarino - University of Naples Federico IIP Guarnaccia - University of Bari Aldo MoroC Gustavino - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), ItalyA Habig - Boston UniversityK Hanson - University of Michigan–Ann ArborA Hawthorne - Indiana UniversityR Heinz - Indiana UniversityY Huang - California Institute of TechnologyE Iarocci - Sapienza University of RomeE Katsavounidis - California Institute of TechnologyI Katsavounidis - California Institute of TechnologyE Kearns - Boston UniversityH Kim - California Institute of TechnologyS Kyriazopoulou - California Institute of TechnologyE Lamanna - Sapienza University of RomeC Lane - Drexel UniversityD.S Levin - Dipartimento di Fisica dell'Università di Roma “La Sapienza" and INFN, 00185 Roma, ItalyP Lipari - Sapienza University of RomeN.P Longley - Swarthmore CollegeM.J Longo - University of Michigan–Ann ArborF Maaroufi - University of BolognaG Mancarella - University of SalentoG Mandrioli - University of BolognaS Manzoor - University of BolognaA Margiotta Neri - Dipartimento di Fisica dell'Università di Bologna and INFN, 40126 Bologna, ItalyA Marini - DELL (United States)D Martello - University of SalentoA Marzari-Chiesa - University of TurinM.N Mazziotta - University of Bari Aldo MoroC Mazzotta - University of SalentoD.G Michael - California Institute of TechnologyS Mikheyev - California Institute of TechnologyL Miller - Indiana UniversityP Monacelli - University of L'AquilaT Montaruli - University of Bari Aldo MoroM Monteno - University of TurinS Mufson - Indiana UniversityJ Musser - Indiana UniversityD Nicoló - University of PisaR Nolty - California Institute of TechnologyC Okada - Boston UniversityC Orth - Boston UniversityG Osteria - University of Naples Federico IIM Ouchrif - University of BolognaO Palamara - University of SalentoV Patera - Sapienza University of RomeL Patrizii - University of BolognaR Pazzi - University of PisaC.W Peck - California Institute of TechnologyS Petrera - University of L'AquilaP Pistilli - Roma Tre UniversityV Popa - University of BolognaV Pugliese - Sapienza University of RomeA Rainó - University of Bari Aldo MoroJ Reynoldson - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), ItalyF Ronga - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), ItalyU Rubizzo - University of Naples Federico IIA Sanzgiri - University of BasilicataC Satriano - University of BasilicataL Satta - Sapienza University of RomeE Scapparone - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), ItalyK Scholberg - Boston UniversityA Sciubba - Sapienza University of RomeP Serra-Lugaresi - University of BolognaM Severi - Sapienza University of RomeM Sioli - University of BolognaM Sitta - University of TurinP Spinelli - University of Bari Aldo MoroM Spinetti - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), ItalyM Spurio - University of BolognaR Steinberg - Drexel UniversityJ.L Stone - Boston UniversityL.R Sulak - Boston UniversityA Surdo - University of SalentoG Tarlé - University of Michigan–Ann ArborV Togo - University of BolognaD Ugolotti - University of BolognaM Vakili - Texas A&M UniversityC.W Walter - Boston UniversityR Webb - Texas A&M UniversityMACRO collaboration
- Publication Details
- Physics letters. B, v 434(3), pp 451-457
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000075879400028
- Scopus ID
- 2-s2.0-4243515176
- Other Identifier
- 991019297212904721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics
- Physics, Nuclear
- Physics, Particles & Fields