Measurement of quark momentum distributions in the proton using an antineutrino probe

Journal Article · Fri Jan 01 04:00:00 EST 1982 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.25.1· OSTI ID:5717580

Barnes, V E; Carman, T S; Carmony, D D; Fernandez, E; Garfinkel, A F; Laasanen, A T; Derrick, M; Gregory, P; LoPinto, F; Musgrave, B; Schlereth, J; Schreiner, P; Singer, R; Barish, S J; Brock, R; Engler, A; Kikuchi, T; Kraemer, R W; Messing, F; Stacey, B J ; Tabak, M

We present the results of a study of the inclusive reaction nu-barp ..--> mu../sup +/X/sup 0/ for antineutrino energies from 5 to 150 GeV. The data were obtained by exposing the Fermi National Accelerator Laboratory hydrogen-filled 15-foot bubble chamber to a wide-band antineutrino beam. This is the first high-energy antineutrino experiment in which a pure proton target was used. The experimental problems of selecting the required sample of charged-current antineutrino-induced events are discussed in detail. A Monte Carlo simulation of the experiment is used to provide correction factors to the measured distributions. A measurement of the x dependence of the inelasticity (y) distributions gives the proton structure functions F/sup nu-barp//sub 3/(x) and xF/sub 3//sup v/p(x)up to an overall normalization constant. When expressed in terms of the quark-parton model, the quark distributions u(x) and d-bar(x)+s-bar(x) are determined. The results for u(x) are found to be in excellent agreement with models based on fits to electron and muon scattering data. Using these results to fix the u(x) normalization, an absolute measurement is made of x(d-bar(x)+s-bar(x)), the antiquark momentum distribution.

• Research Organization: Purdue University, West Lafayette, Indiana 47907
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5717580
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 25:1; ISSN PRVDA
• 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
ANTILEPTON-PROTON INTERACTIONS
ANTILEPTONS
ANTIMATTER
ANTINEUTRINO-NUCLEON INTERACTIONS
ANTINEUTRINO-PROTON INTERACTIONS
ANTIPARTICLES
BARYONS
BUBBLE CHAMBERS
CHARGED-CURRENT INTERACTIONS
COMPOSITE MODELS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
FUNCTIONS
GAS TRACK DETECTORS
GEV RANGE
HADRONS
HYDROGEN
INCLUSIVE INTERACTIONS
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LEPTON-PROTON INTERACTIONS
LEPTONS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MOMENTUM TRANSFER
MUONS
MUONS PLUS
NEUTRINO-NUCLEON INTERACTIONS
NEUTRINO-PROTON INTERACTIONS
NONMETALS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTON MODEL
PROTONS
QUARK MODEL
RADIATION DETECTORS
STRUCTURE FUNCTIONS