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

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5367638

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 were obtained during an exposure to neutrinos produced in the 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}} Bohr magnetons 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 transition between specific nuclear states. The result is in good agreement with theoretical predictions.

• Research Organization: Maryland Univ., College Park, MD (United States)
• OSTI ID: 5367638
• Country of Publication: United States
• Language: English

Related Subjects

662310* -- Weak & Electromagnetic Interactions of Leptons-- (1992-)
663210 -- Ground-State Radioactivity-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALGEBRAIC CURRENTS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BETA-PLUS DECAY RADIOISOTOPES
CARBON 12
CARBON 12 TARGET
CARBON ISOTOPES
CHARGED CURRENTS
COMPARATIVE EVALUATIONS
CROSS SECTIONS
CURRENTS
DECAY
ELASTIC SCATTERING
ELECTRONS
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EVALUATION
EVEN-EVEN NUCLEI
FERMIONS
INTERACTIONS
ISOTOPES
LEPTON REACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
LIGHT NUCLEI
MAGNETIC MOMENTS
MILLISEC LIVING RADIOISOTOPES
NEUTRAL CURRENTS
NEUTRINO REACTIONS
NEUTRINO-ELECTRON INTERACTIONS
NITROGEN 12
NITROGEN ISOTOPES
NUCLEAR DECAY
NUCLEAR REACTIONS
NUCLEI
ODD-ODD NUCLEI
PARTICLE INTERACTIONS
RADIOISOTOPES
SCATTERING
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
TARGETS
TOTAL CROSS SECTIONS
WEAK CHARGED CURRENTS
WEAK NEUTRAL CURRENTS
WEINBERG ANGLE