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Charm muoproduction in deep inelastic scattering at 269 GeV/c

Thesis/Dissertation ·
OSTI ID:5666667
An experiment was performed at the Fermi National Accelerator Lab, located near Batavia, Illinois, using a positive 269 GeV muon beam incident on a 7.38 meter long iron-plastic scintillator target. With an incident flux of 1.0974 x 10/sup 10/ muons (total luminosity of 2.80 x 10/sup 37//cm/sup 2/), 449 events with two muons in the final state were observed. Applying the track reconstruction and scanning efficiency of approx. 70% gave the expected number of dimuons (644) for this experiment (FNAL experiment 319). Subtracting the Monte Carlo calculated ..pi../K internuclear cascade decay and prompt muon production backgrounds (a total of 56 events), and the QED trident dimuon background (a total of 10 events), yielded 578 dimuon events which were attributed to associated charmed D meson production and semileptonic decay. Using a D anti D Monte Carlo simulation based on the Nieh D anti D production model, the p/sub T/ (transverse momentum of the produced muon with respect to the virtual photon direction) acceptance was calculated and used to unfold the background subtracted renormalized data dimuon p/sub T/ spectra, yielding the total number of dimuon events expected for the experiment without apparatus acceptance. This number of events was used to calculate the cross section for associated charmed meson production, which was calculated to be (3.2 +- 0.8) nanobarns per nucleon. This cross section compares favorably with the cross section calculated by Barger et al., based on the photon-gluon (3.2 +- 0.8) fusion model of quantum chromodynamics, of approximately 5 nanobarns per nucleon for our incident muon energy.
Research Organization:
Michigan State Univ., East Lansing (USA)
OSTI ID:
5666667
Country of Publication:
United States
Language:
English

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Related Subjects

645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BOSONS
CHARGED-PARTICLE REACTIONS
CHARM PARTICLES
CHARMED MESON RESONANCES
CROSS SECTIONS
CYCLIC ACCELERATORS
D RESONANCES
DATA
DECAY
DEEP INELASTIC SCATTERING
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
FERMILAB ACCELERATOR
FERMIONS
GEV RANGE
GEV RANGE 100-1000
HADRONS
INELASTIC SCATTERING
INFORMATION
INTERACTIONS
IRON
LEPTON REACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LEPTONS
MESON RESONANCES
MESONS
METALS
MUON REACTIONS
MUONS
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
POSTULATED PARTICLES
RESONANCE PARTICLES
SCATTERING
SEMILEPTONIC DECAY
SYNCHROTRONS
TRANSITION ELEMENTS
WEAK PARTICLE DECAY