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. Danko; J. 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

doi:10.1103/PhysRevLett.107.021801

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 ν_̄μ production, accumulating an exposure of 1.71×1020 protons on target. In the Far Detector, 97 charged current ν_̄μ 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 ν_μ and ν_̄μ measurements are consistent at the 2.0% confidence level, assuming identical underlying oscillation parameters.

Original language	English (US)
Article number	021801
Journal	Physical review letters
Volume	107
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.107.021801
State	Published - Jul 5 2011

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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., ... Jaffe, D. E. (2011). First direct observation of Muon antineutrino disappearance. Physical review letters, 107(2), Article 021801. https://doi.org/10.1103/PhysRevLett.107.021801

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

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title = "First direct observation of Muon antineutrino disappearance",

abstract = "This Letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for {\=ν}μ production, accumulating an exposure of 1.71×1020 protons on target. In the Far Detector, 97 charged current {\=ν}μ 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(2{\=θ})=0.86-0.12+0.11(stat) ±0.01(syst). The MINOS νμ and {\=ν}μ measurements are consistent at the 2.0% confidence level, assuming identical underlying oscillation parameters.",

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

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AU - Adamson, P.

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.

PY - 2011/7/5

Y1 - 2011/7/5

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.

AB - 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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U2 - 10.1103/PhysRevLett.107.021801

DO - 10.1103/PhysRevLett.107.021801

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SN - 0031-9007

VL - 107

JO - Physical review letters

JF - Physical review letters

IS - 2

M1 - 021801

ER -

First direct observation of Muon antineutrino disappearance

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