Measurement of W-Z interference from neutrino-electron scattering

Conference · Thu Apr 01 04:00:00 EST 1993

DOI:https://doi.org/10.1063/1.45453· OSTI ID:10143772

Burman, R L; Bowles, T J; Carlini, R D; Cochran, D R.F.; Doe, P J; Frank, J S; Potter, M E; Sandberg, V D ^[1]; Krakauer, D A; Talaga, R L ^[2]; Allen, R C; Chen, H H; Hausammann, R; Lee, W P; Lu, X Q; Mahler, H J; Wang, K C ^[3]; Piasetzky, E ^[4]

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1. Los Alamos National Lab., NM (United States)
2. Argonne National Lab., IL (United States)
3. California Univ., Irvine, CA (United States)
4. Tel Aviv Univ. (Israel). Sackler Faculty of Exact Sciences

Neutrino-electron elastic scattering was observed at LAMPF with a 15-ton fine-grained tracking calorimeter exposed to electron-neutrinos from muon decay at rest. The measured {nu}{sub e}e{sup {minus}} {yields} {nu}{sub e}e{sup {minus}} elastic scattering cross section, 10.0 {plus_minus} 1.5(stat) {plus_minus} 0.9(syst) {times} 10{sup {minus}45} cm{sup 2} {times} (E{sub {nu}}(MeV)), gives a model independent measurement of the strength of the destructive interference between the charged and neutral currents, I = {minus}1.07 {plus_minus} 0.21, that agrees well with the standard model (SM) prediction I = {minus}1.08. The agreement between the measured electroweak parameters and SM expectations is used to place limits on neutrino properties, such as neutrino flavor-changing neutral currents and neutrino electromagnetic moments, and on the masses of hypothetical new bosons that would interact with leptons.

• 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; AC05-76ER02504; W-31109-ENG-38
• OSTI ID: 10143772
• Report Number(s): LA-UR--93-1004; CONF-930293--1; ON: DE93010724; CNN: Grant PHY85-01559
• Country of Publication: United States
• Language: English

Related Subjects

662310
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
ELASTIC SCATTERING
INTERMEDIATE VECTOR BOSONS
NEUTRAL CURRENTS
NEUTRINO-ELECTRON INTERACTIONS
SHOWER COUNTERS
STANDARD MODEL
WEAK AND ELECTROMAGNETIC INTERACTIONS OF LEPTONS
WEINBERG ANGLE