Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2011 Jul 8;107(2):021801.
doi: 10.1103/PhysRevLett.107.021801. Epub 2011 Jul 5.

First direct observation of muon antineutrino disappearance

P Adamson  1 , 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, C James, D Jensen, T Kafka, S M S Kasahara, G Koizumi, S Kopp, M Kordosky, A Kreymer, K Lang, G Lefeuvre, J Ling, P J Litchfield, L Loiacono, P Lucas, W A Mann, M L Marshak, N Mayer, A M McGowan, R Mehdiyev, J R Meier, M D Messier, W H Miller, S R Mishra, J Mitchell, C D Moore, J Morfín, L Mualem, S Mufson, J Musser, D Naples, J K Nelson, H B Newman, R J Nichol, T C Nicholls, J A Nowak, J P Ochoa-Ricoux, W P Oliver, M Orchanian, R Ospanov, J Paley, R B Patterson, G Pawloski, G F Pearce, D A Petyt, S Phan-Budd, R K Plunkett, X Qiu, J Ratchford, T M Raufer, B Rebel, P A Rodrigues, C Rosenfeld, H A Rubin, M C Sanchez, J Schneps, P Schreiner, P Shanahan, A Sousa, P Stamoulis, M Strait, N Tagg, R L Talaga, E Tetteh-Lartey, J Thomas, M A Thomson, G Tinti, R Toner, G Tzanakos, J Urheim, P Vahle, B Viren, A Weber, R C Webb, C White, L Whitehead, S G Wojcicki, T Yang, R Zwaska; MINOS Collaboration
Affiliations

First direct observation of muon antineutrino disappearance

P Adamson et al. Phys Rev Lett. .

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 |Δm²| = [3.36(-0.40)(+0.46)(stat) ± 0.06(syst)] × 10⁻³ eV², sin²(2θ) = 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.

PubMed Disclaimer

LinkOut - more resources