Pion structure as observed in Fermilab experiment E 615
In an experiment performed at Fermilab we explore the structure of the pion via the Drell-Yan process, in the reactions ..pi../sup +-/N ..-->.. ..mu../sup +/..mu../sup -/X at 80 and 255 GeV/c. The emphasis is on the kinematic region in which the momentum of the pion is largely carried by a single quark, which proves to be rather accessible to experimental study. The data indicate substantial departures from the expectations of asymptotic QCD, but agree well with a calculation which includes the effect of gluon exchange among the quarks inside the pion. With our large sample of muon pairs, we also set the current-best limits on the decay D/sup 0/ ..-->.. ..mu../sup +/..mu../sup -/ and on D/sup 0/-anti D/sup 0/ mixing.
- Research Organization:
- Princeton Univ., NJ (USA)
- DOE Contract Number:
- AC02-76ER03072
- OSTI ID:
- 5656941
- Report Number(s):
- DOE/ER/03072-36; CONF-8603119-6; ON: DE86010434
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645104* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CHARM PARTICLES
CHARMED MESONS
CONFIGURATION MIXING
CROSS SECTIONS
D MESONS
DATA
DECAY
DRELL MODEL
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FUNCTIONS
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
MASS SPECTRA
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
MUON PAIRS
NUMERICAL DATA
PAIR PRODUCTION
PARTICLE DECAY
PARTICLE INTERACTIONS
PION-NUCLEON INTERACTIONS
PIONS
PSEUDOSCALAR MESONS
SPECTRA
STRUCTURE FUNCTIONS
WEAK PARTICLE DECAY