Charm production by muons and its role in scale-noninvariance
Interactions of 209 GeV muons in the Multimuon Spectrometer at Fermilab have yielded more than 8 x 10/sup 4/ events with two muons in the final state. After reconstruction and cuts, the data contain 20,072 events with (81 +- 10)% attributed to the diffractive production of charmed states decaying to muons. The cross section for diffractive charm muoproduction is 6.9(+1.9,-1.4) nb where the error includes systematic uncertainties. Extrapolated to Q/sup 2/ = 0 with sigma(Q/sup 2/) = sigma(0)(1 + Q/sup 2//..lambda../sup 2/)/sup -2/, the effective cross section for 178 (100) GeV photons is 750(+180,-130) (560(+200,-120)) nb and the parameter ..lambda.. is 3.3 +- 0.2 (2.9 +- 0.2) GeV/c. The ..nu.. dependence of the cross section is similar to that of the photon-gluon-fusion model. A first determination of the structure function for diffractive charm production indicates that charm accounts for approximately 1/3 of the scale-noninvariance observed in inclusive muon-nucleon scattering at low Bjorken x. Okubo-Zweig-Iizuka selection rules and unitarity allow the muon data to set a 90%-confidence lower limit on the psi N total cross section of 0.9 mb.
- Research Organization:
- Princeton Univ., NJ (USA). Dept. of Physics
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76ER03072
- OSTI ID:
- 6520891
- Report Number(s):
- DOE/ER/03072-T3; TRN: 81-007869
- Resource Relation:
- Other Information: Thesis
- Country of Publication:
- United States
- Language:
- English
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Charm production by muons and its role in scale-noninvariance
REVIEW OF NEW RESULTS ON MULTILEPTON PRODUCTION BY MUONS
Related Subjects
DIFFRACTION MODELS
CROSS SECTIONS
MUON-NUCLEON INTERACTIONS
PARTICLE PRODUCTION
CHARM PARTICLES
DATA ANALYSIS
ENERGY SPECTRA
EXPERIMENTAL DATA
FERMILAB ACCELERATOR
GEV RANGE 100-1000
MULTIWIRE PROPORTIONAL CHAMBERS
SHOWER COUNTERS
STRUCTURE FUNCTIONS
ACCELERATORS
CYCLIC ACCELERATORS
DATA
ELEMENTARY PARTICLES
ENERGY RANGE
FUNCTIONS
GEV RANGE
INFORMATION
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE MODELS
POSTULATED PARTICLES
PROPORTIONAL COUNTERS
RADIATION DETECTORS
SPECTRA
SYNCHROTRONS
645104* - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Meson-Induced Interactions- (-1987)