Candidate events in a search for ν̄μ→ν̄e oscillations

Authors

C. Athanassopoulos, Temple University
L. B. Auerbach, Temple University
D. A. Bauer, University of California, Santa Barbara
R. D. Bolton, Los Alamos National Laboratory
B. Boyd, Louisiana Tech University
R. L. Burman, Los Alamos National Laboratory
D. O. Caldwell, University of California, Santa Barbara
I. Cohen, Linfield College
B. D. Dieterle, The University of New Mexico
J. B. Donahue, Los Alamos National Laboratory
A. M. Eisner, University of California
A. Fazely, Southern University and A&M College
F. J. Federspiel, Los Alamos National Laboratory
G. T. Garvey, Los Alamos National Laboratory
M. Gray, University of California, Santa Barbara
R. M. Gunasingha, Louisiana State University
V. Highland, Temple University
R. Imlay, Louisiana State University
K. Johnston, Louisiana Tech University
W. C. Louis, Los Alamos National Laboratory
A. Lu, University of California, Santa Barbara
J. Margulies, Temple University
K. McIlhany, University of California, Riverside
W. Metcalf, Louisiana State University
R. A. Reeder, The University of New Mexico
V. Sandberg, Los Alamos National Laboratory
M. Schillaci, Los Alamos National Laboratory
D. Smith, Embry-Riddle Aeronautical University, Prescott
I. Stancu, University of California, Riverside
W. Strossman, University of California, Riverside
M. K. Sullivan, University of California
G. J. Vandalen, University of California, Riverside
W. Vernon, University of California, San Diego

Document Type

Article

Publication Date

1-1-1995

Abstract

A search for ν̄e's in excess of the number expected from conventional sources has been made using the Liquid Scintillator Neutrino Detector, located 30 m behind the Los Alamos Meson Physics Facility beam stop. The ν̄e are detected via ν̄e p→e+ n with e+ energy between 36 and 60 MeV, followed by a γ ray from np→dγ (2.2 MeV). Using strict cuts to identify γ rays correlated with e+ yields 9 events with only 2.1±0.3 background expected. A likelihood fit to the entire e+ sample results in a total excess of 16.4-8.9+9.7±3.3 events. If attributed to ν̄μ→ν̄e oscillations, this corresponds to an oscillation probability of (0.34-0.18+0.20±0.07)%. © 1995 The American Physical Society.

Publication Source (Journal or Book title)

Physical Review Letters

First Page

2650

Last Page

2653

Recommended Citation

Athanassopoulos, C., Auerbach, L., Bauer, D., Bolton, R., Boyd, B., Burman, R., Caldwell, D., Cohen, I., Dieterle, B., Donahue, J., Eisner, A., Fazely, A., Federspiel, F., Garvey, G., Gray, M., Gunasingha, R., Highland, V., Imlay, R., Johnston, K., Louis, W., Lu, A., Margulies, J., McIlhany, K., Metcalf, W., Reeder, R., Sandberg, V., Schillaci, M., Smith, D., Stancu, I., Strossman, W., Sullivan, M., Vandalen, G., & Vernon, W. (1995). Candidate events in a search for ν̄μ→ν̄e oscillations. Physical Review Letters, 75 (14), 2650-2653. https://doi.org/10.1103/PhysRevLett.75.2650