Measurement of sin/sup 2/theta/sub w/ in semileptonic nu Fe and anti nu Fe interactions

Technical Report · Sat Oct 01 04:00:00 EDT 1983

OSTI ID:5425936

Blair, R E; Bodek, A; Coleman, R N; Edwards, D; Edwards, H T; Fackler, O D; Fisk, H E; Fukushima, Y; Jenkins, K A; Jin, B N

Results from neutral current scattering of muon neutrinos and antineutrinos on iron nuclei by the CCFRR experiment at Fermilab are reported. Our objective is the measurement of sin/sup 2/theta/sub w/ from inclusive semileptonic neutrino-nucleon interactions. Such a measurement, even through it is subject to more corrections than the analogous measurement in neutrino-electron scattering (e.g. due to the presence of a strange quark sea in the nucleon), has a high degree of statistical accuracy and may afford the most precise test of the standard model of electro-weak interactions. Furthermore, the recent observations of the Z/sup 0/ and W/sup - +/ in proton-antiproton collisions give such a measurement added topical interest. The comparison of sin/sup 2/theta/sub w/ determined from the masses of the Z/sup 0/ and W/sup - +/ and from neutrino interactions, i.e. from different processes and energy regions, may hold some surprises. Finally, the grand-unified theories make definite predictions about the value of sin/sup 2/THETA/sub w/ and the lifetime of the proton; sin/sup 2/theta/sub w/ measurements test the validity of these theories. The experiment was performed in Fermilab's dichromatic neutrino beam and utilized a large detector consisting of an iron-scintillator target calorimeter followed by a steel toroidal muon spectrometer.

• Research Organization: California Inst. of Tech., Pasadena (USA); Chicago Univ., IL (USA); Columbia Univ., New York (USA); Fermi National Accelerator Lab., Batavia, IL (USA); Rochester Univ., NY (USA); Rockefeller Univ., New York (USA)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 5425936
• Report Number(s): FERMILAB-CONF-83/76-EXP; CONF-830231-7; ON: DE84003186
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTINEUTRINO-NUCLEON INTERACTIONS
CORRECTIONS
DATA
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
INTERACTIONS
IRON
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MEASURING INSTRUMENTS
METALS
NEUTRAL-CURRENT INTERACTIONS
NEUTRINO-NUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
RADIATION DETECTORS
SCATTERING
SHOWER COUNTERS
TRANSITION ELEMENTS