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Low energy atmospheric muon neutrinos in MACRO

Publication ,  Journal Article
Ambrosio, M; Antolini, R; Auriemma, G; Bakari, D; Baldini, A; Barbarino, GC; Barish, BC; Battistoni, G; Bellotti, R; Bemporad, C; Bernardini, P ...
Published in: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
April 6, 2000
Published version (DOI)

We present the measurement of two event samples induced by atmospheric v(μ) of average energy Ē(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.1. Furthermore, the ratio tests the pathlength dependence of possible oscillations. The data of both samples and their ratio favor maximal mixing and Δm2 ~ 10-3-10-2 eV2. These parameters are in agreement with our results from upward throughgoing muons, induced by v(μ) of much higher energies. (C) 2000 Elsevier Science B.V.

Duke Scholars

Kate Scholberg
Author Kate Scholberg Physics
Christopher Walter
Author Christopher Walter Physics

Published In

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

DOI

10.1016/S0370-2693(00)00267-7

ISSN

0370-2693

Publication Date

April 6, 2000

Volume

478

Issue

1-3

Start / End Page

5 / 13

Related Subject Headings

  • Nuclear & Particles Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
  • 0105 Mathematical Physics
 

Citation

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MLA
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Ambrosio, M., Antolini, R., Auriemma, G., Bakari, D., Baldini, A., Barbarino, G. C., … Sciubba, A. (2000). Low energy atmospheric muon neutrinos in MACRO. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 478(1–3), 5–13. https://doi.org/10.1016/S0370-2693(00)00267-7
Ambrosio, M., R. Antolini, G. Auriemma, D. Bakari, A. Baldini, G. C. Barbarino, B. C. Barish, et al. “Low energy atmospheric muon neutrinos in MACRO.” Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 478, no. 1–3 (April 6, 2000): 5–13. https://doi.org/10.1016/S0370-2693(00)00267-7.
Ambrosio M, Antolini R, Auriemma G, Bakari D, Baldini A, Barbarino GC, et al. Low energy atmospheric muon neutrinos in MACRO. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2000 Apr 6;478(1–3):5–13.
Ambrosio, M., et al. “Low energy atmospheric muon neutrinos in MACRO.” Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 478, no. 1–3, Apr. 2000, pp. 5–13. Scopus, doi:10.1016/S0370-2693(00)00267-7.
Ambrosio M, Antolini R, Auriemma G, Bakari D, Baldini A, Barbarino GC, Barish BC, Battistoni G, Bellotti R, Bemporad C, Bernardini P, Bilokon H, Bisi V, Bloise C, Bower C, Brigida M, Bussino S, Cafagna F, Calicchio M, Campana D, Carboni M, Cecchini S, Cei F, Chiarella V, Choudhary BC, Coutu S, De Cataldo G, Dekhissi H, De Marzo C, De Mitri I, Derkaoui J, De Vincenzi M, Di Credico A, Erriquez O, Favuzzi C, Forti C, Fusco P, Giacomelli G, Giannini G, Giglietto N, Giorgini M, Grassi M, Gray L, Grillo A, Guarino F, Gustavino C, Habig A, Hanson K, Heinz R, Iarocci E, Katsavounidis E, Katsavounidis I, Kearns E, Kim H, Kyriazopoulou S, Lamanna E, Lane C, Levin DS, Lipari P, Longley NP, Longo MJ, Loparco F, Maaroufi F, Mancarella G, Mandrioli G, Margiotta A, Marini A, Martello D, Marzari-Chiesa A, Mazziotta MN, Michael DG, Mikheyev S, Miller L, Monacelli P, Montaruli T, Monteno M, Mufson S, Musser J, Nicolòm D, Nolty R, Orth C, Osteria G, Ouchrif M, Palamara O, Patera V, Patrizii L, Pazzi R, Peck CW, Perrone L, Petrera S, Pistilli P, Popa V, Rainòa A, Reynoldson J, Ronga F, Satriano C, Satta L, Scapparone E, Scholberg K, Sciubba A. Low energy atmospheric muon neutrinos in MACRO. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2000 Apr 6;478(1–3):5–13.
Journal cover image

Published In

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

DOI

10.1016/S0370-2693(00)00267-7

ISSN

0370-2693

Publication Date

April 6, 2000

Volume

478

Issue

1-3

Start / End Page

5 / 13

Related Subject Headings

  • Nuclear & Particles Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
  • 0105 Mathematical Physics