The impact of chirally odd condensates on the rho meson |
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Authors: | T. Hilger,R. Thomas,B. Kä mpfer,S. Leupold |
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Affiliation: | 1. Forschungszentrum Dresden-Rossendorf, PF 510119, D-01314 Dresden, Germany;2. TU Dresden, Institut für Theoretische Physik, 01062 Dresden, Germany;3. Institutionen för fysik och astronomi, Uppsala Universitet, Sweden |
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Abstract: | Based on QCD sum rules we explore the consequences of a scenario for the ρ meson, where the chiral symmetry breaking condensates are set to zero whereas the chirally symmetric condensates remain at their vacuum values. This clean-cut scenario causes a lowering of the ρ spectral moment by about 120 MeV. The complementarity of mass shift and broadening is discussed. A simple parametrization of the ρ spectral function leads to a width of about 280 MeV if no shift of the peak position is assumed. |
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Keywords: | Hadron properties QCD sum rules Chiral symmetry Chiral restoration |
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