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26 April 2024

» arxiv » 1109.4227

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The search for n-nbar oscillation in Super-Kamiokande I
Super-Kamiokande collaboration ; K. Abe ; Y. Hayato ; T. Iida ; K. Ishihara ; J. Kameda ; Y. Koshio ; A. Minamino ; C. Mitsuda ; M. Miura ; S. Moriyama ; M. Nakahata ; Y. Obayashi ; H. Ogawa ; H. Sekiya ; M. Shiozawa ; Y. Suzuki ; A. Takeda ; Y. Takeuchi ; K. Ueshima ; H. Watanabe ; I. Higuchi ; C. Ishihara ; M. Ishitsuka ; T. Kajita ; K. Kaneyuki ; G. Mitsuka ; S. Nakayama ; H. Nishino ; K. Okumura ; C. Saji ; Y. Takenaga ; S. Clark ; S. Desai ; F. Dufour ; A. Herfurth ; E. Kearns ; S. Likhoded ; M. Litos ; J.L. Raaf ; J.L. Stone ; L.R. Sulak ; W. Wang ; M. Goldhaber ; D. Casper ; J.P. Cravens ; J. Dunmore ; J. Griskevich ; W.R. Kropp ; D.W. Liu ; S. Mine ; C. Regis ; M.B. Smy ; H.W. Sobel ; M.R. Vagins ; K.S. Ganezer ; B. Hartfiel ; J. Hill ; W.E. Keig ; J.S. Jang ; I.S. Jeoung ; J.Y. Kim ; I.T. Lim ; K. Scholberg ; N. Tanimoto ; C.W. Walter ; R. Wendell ; R.W. Ellsworth ; S. Tasaka ; G. Guillian ; J.G. Learned ; S. Matsuno ; M.D.Messier ; A.K. Ichikawa ; T. Ishida ; T. Ishii ; T. Iwashita ; T. Kobayashi ; T. Nakadaira ; K. Nakamura ; K. Nishikawa ; K. Nitta ; Y. Oyama ; A.T. Suzuki ; M. Hasegawa ; H. Maesaka ; T. Nakaya ; T. Sasaki ; H. Sato ; H. Tanaka ; S. Yamamoto ; M. Yokoyama ; T.J. Haines ; S. Dazeley ; S. Hatakeyama ; R. Svoboda ; G.W. Sullivan ; R. Gran ; A. Habig ; Y. Fukuda ; Y. Itow ; T. Koike ; C.K. Jung ; T. Kato ; K. Kobayashi ; C. McGrew ; A. Sarrat ; R. Terri ; C. Yanagisawa ; N. Tamura ; M. Ikeda ; M. Sakuda ; Y. Kuno ; M. Yoshida ; S.B. Kim ; B.S. Yang ; T. Ishizuka ; H. Okazawa ; Y. Choi ; H.K. Seo ; Y. Gando ; T. Hasegawa ; K. Inoue ; H. Ishii ; K. Nishijima ; H. Ishino ; Y. Watanabe ; M. Koshiba ; Y. Totsuka ; S. Chen ; Z. Deng ; Y. Liu ; D. Kielczewska ; H.G.Berns ; K.K. Shiraishi ; E. Thrane ; K. Washburn ; R.J. Wilkes ;
Date:	20 Sep 2011
Abstract:	A search for neutron-antineutron (n - nbar) oscillation, a process with \|DeltaB\| = 2 that has been predicted by right-left (R-L) symmetric gauge theories, was undertaken using the 24.5 imes10^33 neutron-yrs exposure of Super- Kamiokande I, in an analysis that included the significant sources of experimental uncertainties. No evidence for n - nbar oscillation was found, the lower limit of the lifetime for neutrons bound in ^16 O was determined to be 1.89 imes 10^32 yrs at the 90% confidence level (C.L.), and the corresponding limit for the oscillation time for free neutrons was calculated to be 2.44 imes 10^8 sec using a theoretical suppression factor of 1.0 imes 10^23 sec^-1.
Source:	arXiv, 1109.4227
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