Low energy atmospheric muon neutrinos in MACRO

M. Ambrosio; R. Antolini; G. Auriemma; D. Bakari; A. Baldini; G.C. Barbarino; B.C. Barish; G. Battistoni; R. Bellotti; C. Bemporad; P. Bernardini; H. Bilokon; V. Bisi; C. Bloise; C. Bower; M. Brigida; S. Bussino; F. Cafagna; M. Calicchio; D. Campana; M. Carboni; S. Cecchini; F. Cei; V. Chiarella; B.C. Choudhary; S. Coutu; G. De Cataldo; H. Dekhissi; C. De Marzo; I. De Mitri; J. Derkaoui; M. De Vincenzi; A. Di Credico; O. Erriquez; C. Favuzzi; C. Forti; P. Fusco; G. Giacomelli; G. Giannini; N. Giglietto; M. Giorgini; M. Grassi; L. Gray; A. Grillo; F. Guarino; C. Gustavino; A. Habig; K. Hanson; R. Heinz; E. Iarocci; E. Katsavounidis; I. Katsavounidis; E. Kearns; H. Kim; S. Kyriazopoulou; E. Lamanna; C. Lane; D.S. Levin; P. Lipari; N.P. Longley; M.J. Longo; F. Loparco; F. Maaroufi; G. Mancarella; G. Mandrioli; A. Margiotta; A. Marini; D. Martello; A. Marzari-Chiesa; M.N. Mazziotta; D.G. Michael; S. Mikheyev; L. Miller; P. Monacelli; T. Montaruli; M. Monteno; S. Mufson; J. Musser; D. Nicolò; R. Nolty; C. Orth; G. Osteria; M. Ouchrif; O. Palamara; V. Patera; L. Patrizii; R. Pazzi; C.W. Peck; L. Perrone; S. Petrera; P. Pistilli; V. Popa; A. Rainò; J. Reynoldson; F. Ronga; C. Satriano; L. Satta; E. Scapparone; K. Scholberg; A. Sciubba; P. Serra; M. Sioli; G. Sirri; M. Sitta; P. Spinelli; M. Spinetti; M. Spurio; R. Steinberg; J.L. Stone; L.R. Sulak; A. Surdo; G. Tarlè; V. Togo; M. Vakili; E. Vilela; C.W. Walter; R. Webb; MACRO Collaboration

doi:10.1016/S0370-2693(00)00267-7

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Low energy atmospheric muon neutrinos in MACRO

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Low energy atmospheric muon neutrinos in MACRO

M. Ambrosio, R. Antolini, G. Auriemma, D. Bakari, A. Baldini, G.C. Barbarino, B.C. Barish, G. Battistoni, R. Bellotti, C. Bemporad, …

Physics letters. B, v 478(1), pp 5-13

2000

DOI: https://doi.org/10.1016/S0370-2693(00)00267-7

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Abstract

We present the measurement of two event samples induced by atmospheric ν μ of average energy E ν∼4 GeV. In the first sample, a neutrino interacts inside the MACRO detector producing an upward-going muon leaving the apparatus. The ratio of the number of observed to expected events is 0.57±0.05 stat±0.06 syst±0.14 theor with an angular distribution similar to that expected from the Bartol atmospheric neutrino flux. The second is a mixed sample of internally produced downward-going muons and externally produced upward-going muons stopping inside the detector. These two subsamples are selected by topological criteria; the lack of timing information makes it impossible to distinguish stopping from downgoing muons. The ratio of the number of observed to expected events is 0.71±0.05 stat±0.07 syst±0.18 theor. The observed deficits in each subsample is in agreement with neutrino oscillations, although the significance is reduced by the large theoretical errors. However, the ratio of the two samples causes a large cancellation of theoretical and of some systematic errors. With the ratio, we rule out the no-oscillation hypothesis at 95% c.l. Furthermore, the ratio tests the pathlength dependence of possible oscillations. The data of both samples and their ratio favor maximal mixing and Δm 2∼10 −3–10 −2 eV 2. These parameters are in agreement with our results from upward throughgoing muons, induced by ν μ of much higher energies.

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Title: Low energy atmospheric muon neutrinos in MACRO
Creators: M. Ambrosio - University of Naples Federico II
R. Antolini - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), Italy
G. Auriemma - University of Basilicata
D. Bakari - University of Bologna
A. Baldini - University of Pisa
G.C. Barbarino - University of Naples Federico II
B.C. Barish - California Institute of Technology
G. Battistoni - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), Italy
R. Bellotti - University of Bari Aldo Moro
C. Bemporad - University of Pisa
P. Bernardini - University of Salento
H. Bilokon - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), Italy
V. Bisi - University of Turin
C. Bloise - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), Italy
C. Bower - Depts. of Physics and of Astronomy, Indiana University, Bloomington, IN 47405, USA
M. Brigida - University of Bari Aldo Moro
S. Bussino - Dipartimento di Fisica dell'Università di Roma Tre and INFN Sezione Roma Tre, 00146 Roma, Italy
F. Cafagna - University of Bari Aldo Moro
M. Calicchio - University of Bari Aldo Moro
D. Campana - University of Naples Federico II
M. Carboni - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), Italy
S. Cecchini - University of Bologna
F. Cei - University of Michigan–Ann Arbor
V. Chiarella - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), Italy
B.C. Choudhary - California Institute of Technology
S. Coutu - Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA
G. De Cataldo - University of Bari Aldo Moro
H. Dekhissi - University of Bologna
C. De Marzo - University of Bari Aldo Moro
I. De Mitri - University of Salento
J. Derkaoui - University of Bologna
M. De Vincenzi - Roma Tre University
A. Di Credico - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), Italy
O. Erriquez - University of Bari Aldo Moro
C. Favuzzi - University of Bari Aldo Moro
C. Forti - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), Italy
P. Fusco - University of Bari Aldo Moro
G. Giacomelli - University of Bologna
G. Giannini - University of Pisa
N. Giglietto - University of Bari Aldo Moro
M. Giorgini - University of Bologna
M. Grassi - University of Pisa
L. Gray - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), Italy
A. Grillo - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), Italy
F. Guarino - University of Naples Federico II
C. Gustavino - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), Italy
A. Habig - Boston University
K. Hanson - University of Michigan–Ann Arbor
R. Heinz - Indiana University
E. Iarocci - Sapienza University of Rome
E. Katsavounidis - California Institute of Technology
I. Katsavounidis - California Institute of Technology
E. Kearns - Boston University
H. Kim - California Institute of Technology
S. Kyriazopoulou - California Institute of Technology
E. Lamanna - University of Calabria
C. Lane - Drexel University
D.S. Levin - University of Michigan–Ann Arbor
P. Lipari - Sapienza University of Rome
N.P. Longley - California Institute of Technology
M.J. Longo - University of Michigan–Ann Arbor
F. Loparco - University of Bari Aldo Moro
F. Maaroufi - University of Bologna
G. Mancarella - University of Salento
G. Mandrioli - University of Bologna
A. Margiotta - University of Bologna
A. Marini - DELL (United States)
D. Martello - University of Salento
A. Marzari-Chiesa - University of Turin
M.N. Mazziotta - University of Bari Aldo Moro
D.G. Michael - California Institute of Technology
S. Mikheyev - California Institute of Technology
L. Miller - Indiana University
P. Monacelli - University of L'Aquila
T. Montaruli - University of Bari Aldo Moro
M. Monteno - University of Turin
S. Mufson - Indiana University
J. Musser - Indiana University
D. Nicolò - University of Pisa
R. Nolty - California Institute of Technology
C. Orth - Boston University
G. Osteria - University of Naples Federico II
M. Ouchrif - University of Bologna
O. Palamara - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), Italy
V. Patera - Sapienza University of Rome
L. Patrizii - University of Bologna
R. Pazzi - University of Pisa
C.W. Peck - California Institute of Technology
L. Perrone - University of Salento
S. Petrera - University of L'Aquila
P. Pistilli - Roma Tre University
V. Popa - University of Bologna
A. Rainò - University of Bari Aldo Moro
J. Reynoldson - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), Italy
F. Ronga - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), Italy
C. Satriano - University of Basilicata
L. Satta - Sapienza University of Rome
E. Scapparone - Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), Italy
K. Scholberg - Boston University
A. Sciubba - Sapienza University of Rome
P. Serra - University of Bologna
M. Sioli - University of Bologna
G. Sirri - University of Bologna
M. Sitta - University of Turin
P. Spinelli - University of Bari Aldo Moro
M. Spinetti - Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), Italy
M. Spurio - University of Bologna
R. Steinberg - Drexel University
J.L. Stone - Boston University
L.R. Sulak - Boston University
A. Surdo - University of Salento
G. Tarlè - University of Michigan–Ann Arbor
V. Togo - University of Bologna
M. Vakili - Texas A&M University
E. Vilela - University of Bologna
C.W. Walter - Boston University
R. Webb - Texas A&M University
MACRO Collaboration
Publication Details: Physics letters. B, v 478(1), pp 5-13
Publisher: Elsevier
Resource Type: Journal article
Language: English
Academic Unit: Physics
Web of Science ID: WOS:000086540600002
Scopus ID: 2-s2.0-0034611573
Other Identifier: 991019296795704721

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Collaboration types: Domestic collaboration; International collaboration
Web of Science research areas: Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields

Low energy atmospheric muon neutrinos in MACRO

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