Charm production by muons and its role in scale-noninvariance

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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.. ... continued below

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Pages: 257

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Gollin, G D January 1, 1981.

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Description

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.

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Pages: 257

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NTIS, PC A12/MF A01.

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  • Other Information: Thesis

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  • Report No.: DOE/ER/03072-T3
  • Grant Number: AC02-76ER03072
  • DOI: 10.2172/6520891 | External Link
  • Office of Scientific & Technical Information Report Number: 6520891
  • Archival Resource Key: ark:/67531/metadc1207261

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • January 1, 1981

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Aug. 30, 2018, 5:03 p.m.

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Gollin, G D. Charm production by muons and its role in scale-noninvariance, report, January 1, 1981; United States. (digital.library.unt.edu/ark:/67531/metadc1207261/: accessed January 19, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.