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| Format: | Artículo científico |
| Sprache: | en |
| Veröffentlicht: |
Sociedade Brasileira de Física
2004
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=46400115 |
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Inhaltsangabe:
- The Flavor Asymmetry in the Polarized Proton Sea F. M. Steffens Física, Astronomía y Matemáticas We discuss several key problems of conventional QCD glueball sum rules in the spin-0 channels and showhow they are overcome by nonperturbative Wilson coefficients. The nonperturbative contributions originatefrom direct instantons and, in the pseudoscalar channel, additionally from topological charge screening. Thetreatment of the direct-instanton sector is based on realistic instanton size distributions and renormalizationat the operator scale. The resulting predictions for spin-0 glueball properties as well as their implications forexperimental glueball searches are discussed. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46400115 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.1A Vol.34