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Multiplicity distributions in nu-bar/sub. mu. /p interactions

Journal Article · · Phys. Rev. D; (United States)
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We present the multiplicity distributions of the hadrons produced in antineutrino-proton interactions. The data sample, which consists of 2025 charged-current events with antineutrino energy greater than 5 GeV, comes from exposures of the 15-foot hydrogen bubble chamber to the broad-band antineutrino beam at Fermilab. The distributions in hadronic mass W has an average value of 3.7 GeV but extends up to 10 GeV. The mean multiplicity of charge hadrons depends on the hadronic mass W and varies as = (-0.44 +- 0.13) + (1.48 +- 0.06)lnW/sup 2/ for W/sup 2/>4 GeV/sup 2/. The mean multiplicities for events with three or more charged tracks averaged over the total data sample are = 1.68 +- 0.03 and = 1.11 +- 0.07 for ..pi../sup -/ and ..pi../sup 0/ production, respectively. The mean ..pi../sup 0/ multiplicity is found to increase slowly with n/sub -/. The integrated correlation coefficient f/sup - -//sub 2/ and the dispersion D/sup -/ are given as a function of n/sub -/. When compared to the distributions characteristic of other leptonic and hadronic reactions, we find a similarity between the nu-bar data and results from hadronic reactions that have no diffractive component. Multiplicity data for the heavier particles K/sup 0/, rho/sup 0/, and ..lambda.. are also summarized. The pion multiplicities in the current fragmentation region exceed those for the target fragmentation at all W values. They also satisfy the isospin relation 2 = + required for the fragmentation of an I = 1/2 quark when a W>4 GeV selection is imposed.
Research Organization:
Argonne National Laboratory, Argonne, Illinois 60439
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
5727660
Journal Information:
Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 25:3; ISSN PRVDA
Country of Publication:
United States
Language:
English

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Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTON-PROTON INTERACTIONS
ANTINEUTRINO-NUCLEON INTERACTIONS
ANTINEUTRINO-PROTON INTERACTIONS
BUBBLE CHAMBERS
CHARGED-CURRENT INTERACTIONS
DATA
ELEMENTARY PARTICLES
ELEMENTS
EXPERIMENTAL DATA
FRAGMENTATION
GAS TRACK DETECTORS
HADRONS
HYDROGEN
INFORMATION
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LEPTON-PROTON INTERACTIONS
MASS
MEASURING INSTRUMENTS
MULTIPLICITY
NEUTRINO-NUCLEON INTERACTIONS
NEUTRINO-PROTON INTERACTIONS
NONMETALS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
RADIATION DETECTORS