EVIDENCE FOR (NU)OVER-BAR(MU)-](NU)OVER-BAR(E) OSCILLATIONS FROM THE LSND EXPERIMENT AT THE LOS-ALAMOS MESON PHYSICS FACILITY

Authors
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
Citation
C. Athanassopoulos et al., EVIDENCE FOR (NU)OVER-BAR(MU)-](NU)OVER-BAR(E) OSCILLATIONS FROM THE LSND EXPERIMENT AT THE LOS-ALAMOS MESON PHYSICS FACILITY, Physical review letters, 77(15), 1996, pp. 3082-3085
Citations number
15
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
77
Issue
15
Year of publication
1996
Pages
3082 - 3085
Database
ISI
SICI code
0031-9007(1996)77:15<3082:EF(OFT>2.0.ZU;2-R
Abstract
A search for <(nu)over bar (mu)> --> <(nu)over bar (e)> oscillations h as 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 i dentify e(+) events with correlated gamma rays yields 22 events with e (+) energy between 36 and 60 MeV and only 4.6 +/- 0.6 background event s. A fit to the e(+) events between 20 and 60 MeV yields a total exces s 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 osc illation probability of (0.31 +/- 0.12 +/- 0.05)%.