Measurement of neutrino electron scattering and inverse beta-decay of carbon using neutrinos from stopped muon decay

Technical Report · Wed Apr 01 04:00:00 EST 1992

OSTI ID:5360143

Krakauer, D A

Electron-neutrino electron elastic scattering and two-body electron- neutrino carbon scattering reactions were observed using a 15 ton fine-grained detector and neutrinos from {mu}{sup +} decay at rest. The data was obtained during an exposure to neutrinos produced in LAMPF proton beam-stop. Based on identification of 262{plus minus}46 {nu}{sub e}e{sup {minus}} events the total cross-section for {nu}{sub e}e{sup {minus}} {yields} {nu}{sub e}e{sup {minus}} was measured to be {sigma}({nu}{sub e}E{sup {minus}}) = (3.09{plus minus}0.54(stat){plus minus}0.39(syst)) {times} 10{sup {minus}43} cm{sup 2}. The interference between the weak charged and neutral currents was measured for the first time. The interference was found to be destructive, with a magnitude 0.97{plus minus}0.22 times the value predicted by the WSG theory. The total cross-section was also used to measure sin{sup 2}{theta}{sub W} = 0.24{plus minus}0.06(stat){plus minus}0.04(syst). The data restricts the maximum allowed value of the neutrino magnetic moment to be less than 1.3 {times} 10{sup {minus}9} Bohr magnetrons for {nu}{sub e} and 8.8 {times} 10{sup {minus}10} for {nu}{sub mu}. In a separate analysis, 182{plus minus}22 {sup 12}C({nu}{sub e},e{sup {minus}}) {sup 12}N(gs) events with subsequent {sup 12}N({beta}{sup +}) {sup 12}C were observed, corresponding to a total cross-section, {sigma}({nu}{sub e} {sup 12}C {yields} e{sup {minus}} {sup 12}N(gs)) = (1.03 {plus minus} 0.12(stat) {plus minus} 0.10(sys)) {times}10{sup {minus}41} cm{sup 2}. This was the first observation of {nu}{sub e}-induced transitions between specific nuclear states. The results is good agreement with theoretical predictions.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5360143
• Report Number(s): LA-12262-T; ON: DE92011451
• Country of Publication: United States
• Language: English

Related Subjects

662310* -- Weak & Electromagnetic Interactions of Leptons-- (1992-)
663420 -- Lepton-Induced Reactions & Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
CARBON 12 TARGET
CROSS SECTIONS
DATA
DATA ACQUISITION SYSTEMS
DECAY
ELASTIC SCATTERING
EXPERIMENTAL DATA
INFORMATION
INTERACTIONS
LEPTON REACTIONS
LEPTON-LEPTON INTERACTIONS
MAGNETIC MOMENTS
NEUTRINO REACTIONS
NEUTRINO-ELECTRON INTERACTIONS
NUCLEAR DECAY
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
SCATTERING
TARGETS
WEINBERG ANGLE