Measurement of the hadronic charm production cross section in a high resolution streamer chamber experiment

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5143003

Tzeng, L

Hadronic production of charmed particles in association with muons from semileptonic decay of these short lived particles have been observed in a high resolution streamer chamber experiment performed at Fermi National Accelerator Laboratory in 1982. The incident beam was a collimated high energy neutron beam with an average energy of about 280 GeV. The streamer chamber was triggered on the detection of the prompt muon from the charm decay. Two toroids were installed at the downstream end of the muon spectrometer for analyzing the muon momentum. For the resolution of the streamer chamber, the author achieved to obtain a streamer size of about 50 ..mu..m, a full track width of about 120 ..mu..m in space. The streamer chamber optical system had a demagnification factor of about 1.5 from space to film. The minimum separation between two measurable tracks was about 150 ..mu..m on the film. With a special miss-distance analysis on the streamer chamber pictures, 17.32 +/- 4.73 charm signal events were obtained. Using the assumption of A/sup 2/3/ dependence for the production cross section and several different D-anti D production models, the nucleon-nucleon charm production cross section, averaged over the neutron spectrum, is estimated to be on the order of 13 to 20 ..mu..b (with the average value equal to 17.70 +/- 6.80 ..mu..b).

• Research Organization: Yale Univ., New Haven, CT (USA)
• OSTI ID: 5143003
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BOSONS
CHARM PARTICLES
CROSS SECTIONS
CYCLIC ACCELERATORS
D MESONS
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMILAB ACCELERATOR
FERMIONS
GAS TRACK DETECTORS
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
LEPTONS
MASS NUMBER
MEASURING INSTRUMENTS
MESONS
MUONS
NUCLEON-NUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SEMILEPTONIC DECAY
SPARK CHAMBERS
STREAMER SPARK CHAMBERS
SYNCHROTRONS
WEAK PARTICLE DECAY