First Direct Observation of Muon Antineutrino Disappearance

Autoria(s): 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.; JONG, J. K. de; 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, Philippe; 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.; JAMES, C.; JENSEN, D.; KAFKA, T.; KASAHARA, S. M. S.; KOIZUMI, G.; KOPP, S.; KORDOSKY, M.; KREYMER, A.; LANG, K.; LEFEUVRE, G.; LING, J.; LITCHFIELD, P. J.; LOIACONO, L.; LUCAS, P.; MANN, W. A.; MARSHAK, M. L.; MAYER, N.; MCGOWAN, A. M.; MEHDIYEV, R.; MEIER, J. R.; MESSIER, M. D.; MILLER, W. H.; MISHRA, S. R.; MITCHELL, J.; MOORE, C. D.; MORFIN, J.; MUALEM, L.; MUFSON, S.; MUSSER, J.; NAPLES, D.; NELSON, J. K.; NEWMAN, H. B.; NICHOL, R. J.; NICHOLLS, T. C.; NOWAK, J. A.; OCHOA-RICOUX, J. P.; OLIVER, W. P.; ORCHANIAN, M.; OSPANOV, R.; PALEY, J.; PATTERSON, R. B.; PAWLOSKI, G.; PEARCE, G. F.; PETYT, D. A.; PHAN-BUDD, S.; PLUNKETT, R. K.; QIU, X.; RATCHFORD, J.; RAUFER, T. M.; REBEL, B.; RODRIGUES, P. A.; ROSENFELD, C.; RUBIN, H. A.; SANCHEZ, M. C.; SCHNEPS, J.; SCHREINER, P.; SHANAHAN, P.; SOUSA, A.; STAMOULIS, P.; STRAIT, M.; TAGG, N.; TALAGA, R. L.; TETTEH-LARTEY, E.; THOMAS, J.; THOMSON, M. A.; TINTI, G.; TONER, R.; TZANAKOS, G.; URHEIM, J.; VAHLE, P.; VIREN, B.; WEBER, A.; WEBB, R. C.; WHITE, C.; WHITEHEAD, L.; WOJCICKI, S. G.; YANG, T.; ZWASKA, R.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO
Data(s)

18/04/2012

18/04/2012

2011
Resumo

This Letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for (nu) over bar (mu) production, accumulating an exposure of 1.71 x 10(20) protons on target. In the Far Detector, 97 charged current (nu) over bar (mu) events are observed. The no-oscillation hypothesis predicts 156 events and is excluded at 6.3 sigma. The best fit to oscillation yields vertical bar Delta(m) over bar (2)vertical bar = [3.36(-0.40)(+0.46)(stat) +/- 0.06(sys)] x 10(-3) eV(2), sin(2)(2 (theta) over bar) = 0.86(-0.12)(+0.11)(stat) +/- 0.01(syst). The MINOS nu(mu) and (nu) over bar (mu) measurements are consistent at the 2.0% confidence level, assuming identical underlying oscillation parameters.

U.S. DOE

United Kingdom STFC

U.S. NSF National Science Foundation

State of Minnesota

University of Athens, Greece

Brazil FAPESP

Brazil CNPq

University of Minnesota
Identificador

PHYSICAL REVIEW LETTERS, v.107, n.1, 2011

0031-9007

http://producao.usp.br/handle/BDPI/16023

10.1103/PhysRevLett.107.021801

http://dx.doi.org/10.1103/PhysRevLett.107.021801
Idioma(s)

eng
Publicador

AMER PHYSICAL SOC
Relação

Physical Review Letters
Direitos

restrictedAccess

Copyright AMER PHYSICAL SOC
Palavras-Chave #NEUTRINO OSCILLATIONS #LEPTON CHARGE #MATTER #Physics, Multidisciplinary
Tipo

article

original article

publishedVersion
Acesso ao item digital