Hadronic structure of the weak neutral current. [Cross sections]

Technical Report · Thu Sep 01 04:00:00 EDT 1977

DOI:https://doi.org/10.2172/5330436· OSTI ID:5330436

Marriner, J

A comparison of neutral and charged current deep inelastic neutrino interactions is made in an experiment utilizing the Fermilab 15 ft bubble chamber. The ratio of neutral current events (NC) to charged current events (CC) is 0.35 +- .06 when the visible hadronic energy is greater than 10 GeV. The distributions of NC and CC in a new variable called u/sub vis/, which depends only on the observed hadrons, are given. From these distributions and the assumption that the x distribution is the same for NC and CC, it is concluded that for a NC y distribution of the form (1 - eta) + 3eta(1 - y)/sup 2/, eta = 0.12 +- 0.32. The ratio rho/sub NC/(rho/sub CC/) of neutron to proton cross sections in NC (CC) is studied and the quotient rho/sub NC//rho/sub CC/ = 0.7 +- 0.2. The distribution of hadrons in z/sub vis/, the scaled hadronic momentum, is given. The CC hadrons fit the predictions of the quark fragmentation functions D/sub u//sup ..pi../sup +//(z) and D/sub u//sup ..pi../sup -//(z) as given by Field and Feynman. The neutral current events fit the form (1 - lambda) D/sub u//sup ..pi../sup +//(z) + lambda D/sub d//sup ..pi../sup +//(z) for positives and (1 - lambda) D/sub u//sup ..pi../sup -//(z) + lambda D/sub d//sup ..pi../sup -//(z) for negatives with lambda = 0.56 +- 0.10 and a fit confidence level of 4 percent.

• Research Organization: California Univ., Berkeley (USA). Lawrence Berkeley Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5330436
• Report Number(s): LBL-6438
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
BARYONS
CHARGED-CURRENT INTERACTIONS
CURRENTS
DEEP INELASTIC SCATTERING
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
NEUTRAL CURRENTS
NEUTRINO-NUCLEON INTERACTIONS
NEUTRONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE STRUCTURE
PROTONS
SCATTERING
WEAK NEUTRAL CURRENTS