Extracting infrared QCD coupling from meson spectrum
In the framework of the Bethe-Salpeter formalism used in previous papers to evaluate the quarkonium spectrum, here we reverse the point of view to extract an 'experimental' running coupling in the infrared (IR) region from the data. The values so obtained agree within the erros with the Sh...
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| Veröffentlicht in: | AIP conference proceedings 2007-01, Vol.892 (1), p.340-342 |
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| creator | Baldicchi, M Prosperi, G M Simolo, C |
| description | In the framework of the Bethe-Salpeter formalism used in previous papers to evaluate the quarkonium spectrum, here we reverse the point of view to extract an 'experimental' running coupling in the infrared (IR) region from the data. The values so obtained agree within the erros with the Shirkov-Solovtsov analytic coupling for 200 MeV < Q < 1.2 GeV, thus giving a very satisfactory unifying description of high and low energy phenomena. Below 1 GeV seems to vanish as Q- > 0. The paper is based on a work in progress in collaboration with D. V. Shirkov. |
| doi_str_mv | 10.1063/1.2714412 |
| format | Article |
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| subjects | BETHE-SALPETER EQUATION COUPLING COUPLING CONSTANTS FOUR MOMENTUM TRANSFER GEV RANGE MESON SPECTROSCOPY MEV RANGE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS QUANTUM CHROMODYNAMICS QUARKONIUM |
| title | Extracting infrared QCD coupling from meson spectrum |
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