arXiv:hep-ph/0405035·v1·High Energy Physics — Phenomenology
Determination of the mass of the LambdaLambda dibaryon by the method of QCD sum rules
S. A. Larin🇷🇺 · V. A. Matveev🇷🇺 · A. A. Ovchinnikov🇷🇺 · A. A. Pivovarov🇷🇺
Abstract
The method of QCD sum rules is used to calculate the mass of a hypothetical stable dihyperon H with the quantum numbers of two Lambda hyperons, whose existence was predicted by R.L. Jaffe [Phys. Rev. Lett. 31, 195, 617(E) (1977)] in the framework of the MIT quark-bag model. Within the accuracy of the method of QCD sum rules, which in the present case is 20%, the results obtained here agree with those of Jaffe. However, the method of sum rules does not make it possible to determine whether the mass of the dihyperon H lies above or below the Lambda Lambda threshold (i.e., whether H is stable).
Comments: 10 pages, Latex, 1 figure, electronic version of a published paper