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19 April 2024

» arxiv » nucl-ex/9605003

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Evidence for $ar u_mu oar u_e$ Oscillations from the LSND Experiment at LAMPF
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 ; LSND Collaboration ;
Date:	9 May 1996
Journal:	Phys.Rev.Lett. 77 (1996) 3082-3085
Subject:	nucl-ex hep-ex hep-ph nucl-th
Abstract:	A search for $ar u_{mu} o ar u_{e}$ oscillations has been conducted at the Los Alamos Meson Physics Facility by using $ar u_mu$ from $mu^+$ decay at rest. The $ar u_e$ are detected via the reaction $ar u_e,p ightarrow e^{+},n$, correlated with a $gamma$ from $np ightarrow dgamma$ ($2.2,{ m MeV}$). The use of tight cuts to identify $e^+$ events with correlated $gamma$ rays yields 22 events with $e^+$ energy between 36 and $60,{ m MeV}$ and only $4.6 pm 0.6$ background events. A fit to the $e^+$ events between 20 and $60,{ m MeV}$ yields a total excess of $51.8^{+18.7}_{-16.9} pm 8.0$ events. If attributed to $ar u_mu ightarrow ar u_e$ oscillations, this corresponds to an oscillation probability of ($0.31^{+0.11}_{-0.10} pm 0.05$)\%.
Source:	arXiv, nucl-ex/9605003
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