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Title: Charm production by muons and its role in scale noninvariance

Abstract

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/sup +1.9//sub -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/sup +180//sub -/130 (560/sup +//sub -//sup 2//sub 1//sup 0//sub 2//sup 0//sub 0/) 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. Okubo-Zweig-Iizuka selection rules and unitarity allow the muon data to set a 90%-confidence lower limit on the psiN total cross section of 0.9 mb. A first determination of the structure function F/sub 2/(cc-bar) 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.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Joseph Henry Laboratories, Princeton University, Princeton, New Jeresy 08544
OSTI Identifier:
6189297
Resource Type:
Journal Article
Journal Name:
Phys. Rev. D; (United States)
Additional Journal Information:
Journal Volume: 24:3
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHARM PARTICLES; PAIR PRODUCTION; MUON-NUCLEON INTERACTIONS; INCLUSIVE INTERACTIONS; DIFFRACTION MODELS; FEYNMAN DIAGRAM; GEV RANGE 100-1000; MULTIPLE PRODUCTION; MUONS; PARTON MODEL; QUANTUM CHROMODYNAMICS; SELECTION RULES; STRUCTURE FUNCTIONS; TOTAL CROSS SECTIONS; COMPOSITE MODELS; CROSS SECTIONS; DIAGRAMS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; FIELD THEORIES; FUNCTIONS; GEV RANGE; INTERACTIONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; LEPTONS; MATHEMATICAL MODELS; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PRODUCTION; POSTULATED PARTICLES; QUANTUM FIELD THEORY; 645102* - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties

Citation Formats

Gollin, G.D., Shoemaker, F.C., Surko, P., Clark, A.R., Johnson, K.J., Kerth, L.T., Loken, S.C., Markiewicz, T.W., Meyers, P.D., Smith, W.H., Strovink, M., Wenzel, W.A., Johnson, R.P., Moore, C., Mugge, M., and Shafer, R.E. Charm production by muons and its role in scale noninvariance. United States: N. p., 1981. Web. doi:10.1103/PhysRevD.24.559.
Gollin, G.D., Shoemaker, F.C., Surko, P., Clark, A.R., Johnson, K.J., Kerth, L.T., Loken, S.C., Markiewicz, T.W., Meyers, P.D., Smith, W.H., Strovink, M., Wenzel, W.A., Johnson, R.P., Moore, C., Mugge, M., & Shafer, R.E. Charm production by muons and its role in scale noninvariance. United States. doi:10.1103/PhysRevD.24.559.
Gollin, G.D., Shoemaker, F.C., Surko, P., Clark, A.R., Johnson, K.J., Kerth, L.T., Loken, S.C., Markiewicz, T.W., Meyers, P.D., Smith, W.H., Strovink, M., Wenzel, W.A., Johnson, R.P., Moore, C., Mugge, M., and Shafer, R.E. Sat . "Charm production by muons and its role in scale noninvariance". United States. doi:10.1103/PhysRevD.24.559.
@article{osti_6189297,
title = {Charm production by muons and its role in scale noninvariance},
author = {Gollin, G.D. and Shoemaker, F.C. and Surko, P. and Clark, A.R. and Johnson, K.J. and Kerth, L.T. and Loken, S.C. and Markiewicz, T.W. and Meyers, P.D. and Smith, W.H. and Strovink, M. and Wenzel, W.A. and Johnson, R.P. and Moore, C. and Mugge, M. and Shafer, R.E.},
abstractNote = {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/sup +1.9//sub -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/sup +180//sub -/130 (560/sup +//sub -//sup 2//sub 1//sup 0//sub 2//sup 0//sub 0/) 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. Okubo-Zweig-Iizuka selection rules and unitarity allow the muon data to set a 90%-confidence lower limit on the psiN total cross section of 0.9 mb. A first determination of the structure function F/sub 2/(cc-bar) 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.},
doi = {10.1103/PhysRevD.24.559},
journal = {Phys. Rev. D; (United States)},
number = ,
volume = 24:3,
place = {United States},
year = {1981},
month = {8}
}