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

DOI:https://doi.org/10.2172/5121090· OSTI ID:5121090

Blair, R E; MacFarlane, D B; Messner, R L; Novikoff, D B; Purohit, M V; Merritt, F S; Reutens, P G; Sciulli, F J; Shaevitz, M H; Edwards, D

We report results from neutral current scattering of muon neutrinos and antineutrinos on iron nuclei by the CCFRR experiment at Fermilab. Our objective is the measurement of sin/sup 2/theta/sub w/ from inclusive semileptonic neutrino-nucleon interactions. Such a measurement, even though 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: AC02-81ER40033
• OSTI ID: 5121090
• Report Number(s): DOE/ER/40033-54; ON: DE84008897
• Country of Publication: United States
• Language: English

Related Subjects

645101 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTINEUTRINO-NUCLEON INTERACTIONS
ANTINEUTRINOS
ANTIPARTICLES
CHARGED-CURRENT INTERACTIONS
DATA
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
GEV RANGE 100-1000
INFORMATION
INTERACTIONS
IRON
LEPTON REACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LEPTONS
MASSLESS PARTICLES
METALS
MUON ANTINEUTRINOS
MUON NEUTRINOS
NEUTRAL-CURRENT INTERACTIONS
NEUTRINO REACTIONS
NEUTRINO-NUCLEON INTERACTIONS
NEUTRINOS
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
TRANSITION ELEMENTS