Evidence for nu bar sub mu to nu bar sub e oscillations

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:383037

Federspiel, F J

A search for {bar {nu}}{sub e}`s in excess of the number expected from conventional sources has been made using the Liquid Scintillator Neutrino Detector, located 30 m behind the LAMPF beam stop. The {bar {nu}}{sub e} are detected via {bar {nu}}{sub e}p{r_arrow}e{sup +}n with e{sup +} energy between 36 and 60 MeV, followed by a {gamma} from np{r_arrow}d{gamma} (2.2 MeV). Using strict cuts to identify {gamma}`s correlated with an e{sup +} yields 9 events with only 2.1{+-}0.3 background expected. A likelihood fit to the entire e{sup +} sample results in a total excess of 16.4{sup +9.7}{sub -8.9}{+-}3.3 events. If attributed to {bar {nu}}{sub {mu}}{r_arrow}{bar {nu}}{sub e} oscillations, this corresponds to an oscillation probability of (0.34{sup +0.200}{sub -0.18}{+-}0.07)%.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 383037
• Report Number(s): LA-UR--96-2548; CONF-951062--9; ON: DE96014216
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANTINEUTRINO-PROTON INTERACTIONS
ELECTRON ANTINEUTRINOS
LAMPF LINAC
LIQUID SCINTILLATION DETECTORS
MUON ANTINEUTRINOS
NEUTRINO DETECTION
NEUTRINO OSCILLATION
POSITRONS
PROBABILITY
PRODUCTION