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Evaluation of the Skyrme parameter from QCD sum rules |
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| Authors: | H G Dosch |
| Institution: | Institut für Theoretische Physik, Universität Heidelberg, D-6900, Heidelberg, Fed. Rep. Germany Laboratoire de Physique Mathématique, Université des Sciences et Techniques du Languedoc, Place Eugène-Bataillon, F-34060, Montpellier Cedex, France |
| Abstract: | The dimensionless parameter of the Skyrme lagrangian is evaluated by two methods. In one a combination of sum rules for the nucleon and the pion is used, in the other only baryonic sum rules. e = 5−8 and e = 5−7 is found, respectively, in agreement with the phenomenological value e = 5.45. To leading order in the operator-product expansion the analytical expression of e does not depend on the chiral-symmetry-breaking parameters. |
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