First direct observation of Muon antineutrino disappearance

P. Adamson, C. Andreopoulos, D. J. Auty, D. S. Ayres, C. Backhouse, G. Barr, M. Bishai, A. Blake, G. J. Bock, D. J. Boehnlein, D. Bogert, S. Cavanaugh, D. Cherdack, S. Childress, B. C. Choudhary, J. A.B. Coelho, S. J. Coleman, L. Corwin, D. Cronin-Hennessy, I. Z. DankoJ. K. De Jong, N. E. Devenish, M. V. Diwan, M. Dorman, C. O. Escobar, J. J. Evans, E. Falk, G. J. Feldman, M. V. Frohne, H. R. Gallagher, R. A. Gomes, M. C. Goodman, P. Gouffon, N. Graf, R. Gran, N. Grant, K. Grzelak, A. Habig, D. Harris, J. Hartnell, R. Hatcher, A. Himmel, A. Holin, C. Howcroft, X. Huang, J. Hylen, J. Ilic, G. M. Irwin, Z. Isvan, D. E. Jaffe

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Abstract

This Letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for ν̄μ production, accumulating an exposure of 1.71×1020 protons on target. In the Far Detector, 97 charged current ν̄μ events are observed. The no-oscillation hypothesis predicts 156 events and is excluded at 6.3σ. The best fit to oscillation yields |Δm⊃̄2|=[3.36-0.40+0.46(stat)±0.06(syst)] ×10⊃-3eV2, ⊃sin⊃2(2θ̄)=0.86-0.12+0.11(stat) ±0.01(syst). The MINOS νμ and ν̄μ measurements are consistent at the 2.0% confidence level, assuming identical underlying oscillation parameters.

Original languageEnglish (US)
Article number021801
JournalPhysical Review Letters
Volume107
Issue number2
DOIs
StatePublished - Jul 5 2011

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antineutrinos
muons
oscillations
confidence
accelerators
protons
detectors

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Adamson, P., Andreopoulos, C., Auty, D. J., Ayres, D. S., Backhouse, C., Barr, G., ... Jaffe, D. E. (2011). First direct observation of Muon antineutrino disappearance. Physical Review Letters, 107(2), [021801]. https://doi.org/10.1103/PhysRevLett.107.021801

First direct observation of Muon antineutrino disappearance. / Adamson, P.; Andreopoulos, C.; Auty, D. J.; Ayres, D. S.; Backhouse, C.; Barr, G.; Bishai, M.; Blake, A.; Bock, G. J.; Boehnlein, D. J.; Bogert, D.; Cavanaugh, S.; Cherdack, D.; Childress, S.; Choudhary, B. C.; Coelho, J. A.B.; Coleman, S. J.; Corwin, L.; Cronin-Hennessy, D.; Danko, I. Z.; De Jong, J. K.; Devenish, N. E.; Diwan, M. V.; Dorman, M.; Escobar, C. O.; Evans, J. J.; Falk, E.; Feldman, G. J.; Frohne, M. V.; Gallagher, H. R.; Gomes, R. A.; Goodman, M. C.; Gouffon, P.; Graf, N.; Gran, R.; Grant, N.; Grzelak, K.; Habig, A.; Harris, D.; Hartnell, J.; Hatcher, R.; Himmel, A.; Holin, A.; Howcroft, C.; Huang, X.; Hylen, J.; Ilic, J.; Irwin, G. M.; Isvan, Z.; Jaffe, D. E.

In: Physical Review Letters, Vol. 107, No. 2, 021801, 05.07.2011.

Research output: Contribution to journalArticle

Adamson, P, Andreopoulos, C, Auty, DJ, Ayres, DS, Backhouse, C, Barr, G, Bishai, M, Blake, A, Bock, GJ, Boehnlein, DJ, Bogert, D, Cavanaugh, S, Cherdack, D, Childress, S, Choudhary, BC, Coelho, JAB, Coleman, SJ, Corwin, L, Cronin-Hennessy, D, Danko, IZ, De Jong, JK, Devenish, NE, Diwan, MV, Dorman, M, Escobar, CO, Evans, JJ, Falk, E, Feldman, GJ, Frohne, MV, Gallagher, HR, Gomes, RA, Goodman, MC, Gouffon, P, Graf, N, Gran, R, Grant, N, Grzelak, K, Habig, A, Harris, D, Hartnell, J, Hatcher, R, Himmel, A, Holin, A, Howcroft, C, Huang, X, Hylen, J, Ilic, J, Irwin, GM, Isvan, Z & Jaffe, DE 2011, 'First direct observation of Muon antineutrino disappearance', Physical Review Letters, vol. 107, no. 2, 021801. https://doi.org/10.1103/PhysRevLett.107.021801
Adamson P, Andreopoulos C, Auty DJ, Ayres DS, Backhouse C, Barr G et al. First direct observation of Muon antineutrino disappearance. Physical Review Letters. 2011 Jul 5;107(2). 021801. https://doi.org/10.1103/PhysRevLett.107.021801
Adamson, P. ; Andreopoulos, C. ; Auty, D. J. ; Ayres, D. S. ; Backhouse, C. ; Barr, G. ; Bishai, M. ; Blake, A. ; Bock, G. J. ; Boehnlein, D. J. ; Bogert, D. ; Cavanaugh, S. ; Cherdack, D. ; Childress, S. ; Choudhary, B. C. ; Coelho, J. A.B. ; Coleman, S. J. ; Corwin, L. ; Cronin-Hennessy, D. ; Danko, I. Z. ; De Jong, J. K. ; Devenish, N. E. ; Diwan, M. V. ; Dorman, M. ; Escobar, C. O. ; Evans, J. J. ; Falk, E. ; Feldman, G. J. ; Frohne, M. V. ; Gallagher, H. R. ; Gomes, R. A. ; Goodman, M. C. ; Gouffon, P. ; Graf, N. ; Gran, R. ; Grant, N. ; Grzelak, K. ; Habig, A. ; Harris, D. ; Hartnell, J. ; Hatcher, R. ; Himmel, A. ; Holin, A. ; Howcroft, C. ; Huang, X. ; Hylen, J. ; Ilic, J. ; Irwin, G. M. ; Isvan, Z. ; Jaffe, D. E. / First direct observation of Muon antineutrino disappearance. In: Physical Review Letters. 2011 ; Vol. 107, No. 2.
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abstract = "This Letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for ν̄μ production, accumulating an exposure of 1.71×1020 protons on target. In the Far Detector, 97 charged current ν̄μ events are observed. The no-oscillation hypothesis predicts 156 events and is excluded at 6.3σ. The best fit to oscillation yields |Δm⊃̄2|=[3.36-0.40+0.46(stat)±0.06(syst)] ×10⊃-3eV2, ⊃sin⊃2(2θ̄)=0.86-0.12+0.11(stat) ±0.01(syst). The MINOS νμ and ν̄μ measurements are consistent at the 2.0{\%} confidence level, assuming identical underlying oscillation parameters.",
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AU - Andreopoulos, C.

AU - Auty, D. J.

AU - Ayres, D. S.

AU - Backhouse, C.

AU - Barr, G.

AU - Bishai, M.

AU - Blake, A.

AU - Bock, G. J.

AU - Boehnlein, D. J.

AU - Bogert, D.

AU - Cavanaugh, S.

AU - Cherdack, D.

AU - Childress, S.

AU - Choudhary, B. C.

AU - Coelho, J. A.B.

AU - Coleman, S. J.

AU - Corwin, L.

AU - Cronin-Hennessy, D.

AU - Danko, I. Z.

AU - De Jong, J. K.

AU - Devenish, N. E.

AU - Diwan, M. V.

AU - Dorman, M.

AU - Escobar, C. O.

AU - Evans, J. J.

AU - Falk, E.

AU - Feldman, G. J.

AU - Frohne, M. V.

AU - Gallagher, H. R.

AU - Gomes, R. A.

AU - Goodman, M. C.

AU - Gouffon, P.

AU - Graf, N.

AU - Gran, R.

AU - Grant, N.

AU - Grzelak, K.

AU - Habig, A.

AU - Harris, D.

AU - Hartnell, J.

AU - Hatcher, R.

AU - Himmel, A.

AU - Holin, A.

AU - Howcroft, C.

AU - Huang, X.

AU - Hylen, J.

AU - Ilic, J.

AU - Irwin, G. M.

AU - Isvan, Z.

AU - Jaffe, D. E.

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N2 - This Letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for ν̄μ production, accumulating an exposure of 1.71×1020 protons on target. In the Far Detector, 97 charged current ν̄μ events are observed. The no-oscillation hypothesis predicts 156 events and is excluded at 6.3σ. The best fit to oscillation yields |Δm⊃̄2|=[3.36-0.40+0.46(stat)±0.06(syst)] ×10⊃-3eV2, ⊃sin⊃2(2θ̄)=0.86-0.12+0.11(stat) ±0.01(syst). The MINOS νμ and ν̄μ measurements are consistent at the 2.0% confidence level, assuming identical underlying oscillation parameters.

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