Hadronic charm production by protons and pions on iron

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

OSTI ID:6212175

Ritchie, J L

An experiment to measure the production of prompt single muons by 350 GeV protons and 278 GeV pions on iron has been performed at Fermilab. The measurement was made using a heavily instrumented variable density target-calorimeter (beam dump) followed by a very large acceptance muon detector. These results have been used to study hadronic production of charmed particles. In 350 GeV proton interactions, prompt single ..mu../sup +/ and ..mu../sup -/ production are approximately equal. The charm production cross section is in the range of 20 to 40 ..mu..b/nucleon (most of the uncertainty being due to the uncertainty in the average semi-leptonic branching ratio B; in particular, B (1 - B)sigma/sub charm/ = 1.57 +/- .30 ..mu..b/nucleon for -1 < x/sub F/ < 1). The data are well represented by D anti-D production with E dsigma/dx/sub F/ approx. (1 - x/sub F/)/sup 5/ /sup 0 + -/ /sup 9/. Charmed baryon production is allowed at the 10 ..mu..b/nucleon level. In 278 GeV ..pi../sup -/ interactions, prompt single ..mu../sup -/ production is larger than prompt single ..mu../sup +/ production by almost a factor of two. The source of the ..mu../sup -/ excess has not been firmly established. One possible explanation, which enjoys some support from NA16 data, is the recombination of valence quarks from the beam pion with charmed quarks about 25% of the time.

• Research Organization: Rochester Univ., NY (USA)
• OSTI ID: 6212175
• Country of Publication: United States
• Language: English

Related Subjects

645102 -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Weak Interactions &amp; Properties
645103* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Strong Interactions &amp; Baryon &amp; Meson Properties
645104 -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BARYON REACTIONS
BOSONS
BRANCHING RATIO
CHARGED-PARTICLE REACTIONS
CHARM PARTICLES
CHARMED MESON RESONANCES
CROSS SECTIONS
CYCLIC ACCELERATORS
D RESONANCES
DATA
DECAY
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
FERMILAB ACCELERATOR
FERMIONS
GEV RANGE
GEV RANGE 100-1000
HADRON REACTIONS
HADRONS
INFORMATION
IRON
LEPTONS
MESON REACTIONS
MESON RESONANCES
MESONS
METALS
MUONS
MUONS MINUS
MUONS PLUS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE PRODUCTION
PION MINUS REACTIONS
PION REACTIONS
PROTON REACTIONS
RESONANCE PARTICLES
SEMILEPTONIC DECAY
SYNCHROTRONS
TRANSITION ELEMENTS
WEAK PARTICLE DECAY