The Flavor Asymmetry in the Polarized Proton Sea
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| Format: | Artículo científico |
| Sprache: | en |
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Sociedade Brasileira de Física
2004
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| _version_ | 1876487145575677952 |
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| author | F. M. Steffens |
| author_facet | F. M. Steffens |
| contents | 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 |
| format | Artículo científico |
| id | redalyc_46400115 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | The Flavor Asymmetry in the Polarized Proton Sea F. M. Steffens Física, Astronomía y Matemáticas 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 |
| title | The Flavor Asymmetry in the Polarized Proton Sea |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46400115 |