Politzer, H. David (1977) μ-p scattering and the glue fraction of the proton. Nuclear Physics B, 122 (2). pp. 237-252. ISSN 0550-3213. doi:10.1016/0550-3213(77)90205-X. https://resolver.caltech.edu/CaltechAUTHORS:20160920-085821234
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Abstract
The QCD version of the energy-momentum sum rule is tested against SLAC electroproduction and FNAL muon-proton scattering data. While providing only a single number for each Q2, the energy momentum sum rule is significant because the scaling violations due to gluons can be well determined. In particular, gluons carry 30±8% of the proton's energy-momentum at Q2=3.5 GeV2 (which means 22% at 1 GeV2). The largest single corrections of previous estimates of the glue fraction is the inclusion of gluon bremsstrahlung effects. Agreement with experiment is within the uncertainties in the μ-p data. However, the sum rule does not give a very sensitive test of the value of the quark-gluon coupling constant. The prediction for charm production agrees with the observed rates for dimuon and trimuon production in inelastic μ scattering.
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| Additional Information: | Copyright © 1977 Published by Elsevier B.V. Research supported in part by the National Science Foundation under Grant no. PHY75-20427. | |||||||||
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| Issue or Number: | 2 | |||||||||
| DOI: | 10.1016/0550-3213(77)90205-X | |||||||||
| Record Number: | CaltechAUTHORS:20160920-085821234 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20160920-085821234 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 70453 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Joy Painter | |||||||||
| Deposited On: | 20 Sep 2016 22:11 | |||||||||
| Last Modified: | 11 Nov 2021 04:29 |
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