True parameters of He-4-Sigma hypernucleus

Details True parameters of He-4-Sigma hypernucleus True parameters of He-4-Sigma hypernucleus

1999-02-19

arxiv.org/abs/nucl-th/9902044v1

Phys.Rev. C60 (1999) 037001

Physics

Nuclear Physics

Nuclear Theory

11 pages, 4 Postscript figures

Scientific paper

10.1103/PhysRevC.60.037001

It is shown that the true parameters of He-4-Sigma differ from the observed ones. The reason is that the amplitude of He-4-Sigma production in the reaction He-4(K-,pi-) sharply varies just in the corresponding mass region. It leads to the small, but noticeable shift of the binding energy and the width. Besides, the data at the threshold of Sigma-0 production is found to give an additional evidence that He-4-Sigma width cannot exceed 8.0 - 8.5 MeV.

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