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27 April 2024

» arxiv » nucl-ex/9605001

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Evidence for Neutrino Oscillations from Muon Decay at Rest
C. Athanassopoulos ; L. B. Auerbach ; R. L. Burman ; I. Cohen ; D. O. Caldwell ; B. D. Dieterle ; J. B. Donahue ; A. M. Eisner ; A. Fazely ; F. J. Federspiel ; G. T. Garvey ; M. Gray ; R. M. Gunasingha ; R. Imlay ; K. Johnston ; H. J. Kim ; W. C. Louis ; R. Majkic ; J. Margulies ; K. McIlhany ; W. Metcalf ; G. B. Mills ; R. A. Reeder ; V. Sandberg ; D. Smith ; I. Stancu ; W. Strossman ; R. Tayloe ; G. J. VanDalen ; W. Vernon ; N. Wadia ; J. Waltz ; Y-X. Wang ; D. H. White ; D. Works ; Y. Xiao ; S. Yellin The LSND Collaboration ;
Date:	1 May 1996
Journal:	Phys.Rev. C54 (1996) 2685-2708
Subject:	nucl-ex hep-ex hep-ph nucl-th
Abstract:	A search for nu_bar_mu to nu_bar_e oscillations has been conducted at the Los Alamos Meson Physics Facility using nu_bar_mu from mu+ decay at rest. The nu_bar_e are detected via the reaction (nu_bar_e,p) -> (e+,n), correlated with the 2.2 MeV gamma from (n,p) -> (d,gamma). The use of tight cuts to identify e+ events with correlated gamma rays yields 22 events with e+ energy between 36 and 60 MeV and only 4.6 (+/- 0.6) background events. The probability that this excess is due entirely to a statistical fluctuation is 4.1E-08. A chi^2 fit to the entire e+ sample results in a total excess of 51.8 (+18.7) (-16.9) (+/- 8.0) events with e+ energy between 20 and 60 MeV. If attributed to nu_bar_mu -> nu_bar_e oscillations, this corresponds to an oscillation probability (averaged over the experimental energy and spatial acceptance) of 0.0031 (+0.0011) (-0.0010) (+/- 0.0005).
Source:	arXiv, nucl-ex/9605001
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