What QCD sum rules tell about the rho meson |
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| Affiliation: | 1. Institut für Theoretische Physik, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany;2. Institute for Nuclear Theory, University of Washington, Box 351550, Seattle, WA 98195, USA;1. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;2. Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;1. Department of Theoretical Physics, Tomsk State Pedagogical University, 634061, Tomsk, Russia;2. National Research Tomsk State University, 634050, Tomsk, Russia;3. Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna, Moscow region, Russia;4. Division of Experimental Physics, Tomsk Polytechnic University, 634050, Tomsk, Russia;5. Moscow State University, Faculty of Physics, Department of Theoretical Physics, 119991, Moscow, Russia |
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| Abstract: | Using a simple parametrization of Breit-Wigner type for the hadronic side of the QCD sum rule for ϱ mesons in vacuum as well as in a nuclear medium we explore the range of values for the mass and the width of the ϱ meson, which are compatible with the operator product expansion. |
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