Evidence for (nu)over-bar(mu)->(nu)over-bar(e) oscillations from the LSND experiment at the Los Alamos meson physics facility

被引：829

作者：

Athanassopoulos, C

Auerbach, LB

Burman, RL

Cohen, I

Caldwell, DI

Dieterle, BD

Donahue, JB

Eisner, AM

Fazely, A

Federspiel, FJ

Garvey, GT

Gray, M

Gunasingha, RM

Imlay, R

Johnston, K

Kim, HJ

Louis, WC

Majkic, R

Margulies, J

McIlhany, K

Metcalf, W

Mills, GB

Reeder, RA

Sandberg, V

Smith, D

Stancu, I

Strossman, W

Tayloe, R

VanDalen, GJ

Vernon, W

Wadia, N

Waltz, J

Wang, YX

White, DH

Works, D

Xiao, Y

Yellin, S

机构：

[1] UNIV SAN DIEGO,SAN DIEGO,CA 92093

[2] UNIV CALIF SANTA BARBARA,SANTA BARBARA,CA 93106

[3] EMBRY RIDDLE AERONAUT UNIV,PRESCOTT,AZ 86301

[4] LINFIELD COLL,MCMINNVILLE,OR 97128

[5] LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545

[6] LOUISIANA STATE UNIV,BATON ROUGE,LA 70803

[7] LOUISIANA TECH UNIV,RUSTON,LA 71272

[8] UNIV NEW MEXICO,ALBUQUERQUE,NM 87131

[9] SOUTHERN UNIV,BATON ROUGE,LA 70813

[10] TEMPLE UNIV,PHILADELPHIA,PA 19122

[11] UNIV CALIF,INTERCAMPUS INST RES PARTICLE ACCELERATORS,STANFORD,CA 94309

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.77.3082

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A search for <(nu)over bar (mu)> --> <(nu)over bar (e)> oscillations has been conducted at the Los Alamos Meson Physics Facility by using <(nu)over bar (mu)> from mu(+) decay at rest. The <(nu)over bar (e)> are detected via the reaction <(nu)over bar (e)> p --> e(+)n, correlated with a gamma from np --> d gamma (2.2 MeV). 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. A fit to the e(+) events between 20 and 60 MeV yields a total excess of 51.0(-19.5)(+20.2) +/- 8.0 events. If attributed to <(nu)over bar (mu)> --> <(nu)over bar (e)> oscillations, this corresponds to an oscillation probability of (0.31 +/- 0.12 +/- 0.05)%.

引用

页码：3082 / 3085

页数：4

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