CaltechAUTHORS
  A Caltech Library Service

μ-p scattering and the glue fraction of the proton

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. http://resolver.caltech.edu/CaltechAUTHORS:20160920-085821234

[img] PDF - Published Version
See Usage Policy.

2263Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20160920-085821234

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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/0550-3213(77)90205-XDOIArticle
http://www.sciencedirect.com/science/article/pii/055032137790205XPublisherArticle
ORCID:
AuthorORCID
Politzer, H. David0000-0002-4983-6621
Additional Information:Copyright © 1977 Published by Elsevier B.V. Research supported in part by the National Science Foundation under Grant no. PHY75-20427.
Funders:
Funding AgencyGrant Number
NSFPHY75-20427
Record Number:CaltechAUTHORS:20160920-085821234
Persistent URL:http://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:27 Oct 2017 20:35

Repository Staff Only: item control page