The Prediction of Possible Nonstrange Dibaryon

Recently, the mixing of scalar mesons was introduced into the chiral SU（3） quark model and also dynamically applied to the baryon-baryon system. The results show that the nucleon-nucleon and hyperon-nucleon scattering data can be reasonably described for different mixing cases, one is ideal mixing a...

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Bibliographic Details
Published in:Chinese physics letters 2014, Vol.31 (1), p.52-55
Main Author: 戴连荣
Format: Article
Language:English
Subjects:
Binding energy
Dynamical systems
Dynamics
Exchange
Mathematical models
Quark models
Scalars
Scattering
候选人
双重子
手征SU（3）夸克模型
束缚态
核子
混合
结合能
预测
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Summary:Recently, the mixing of scalar mesons was introduced into the chiral SU（3） quark model and also dynamically applied to the baryon-baryon system. The results show that the nucleon-nucleon and hyperon-nucleon scattering data can be reasonably described for different mixing cases, one is ideal mixing and the other is θs= 19° mixing. In the present work, by taking the above parameters, the possible candidate of deltaron bound state is further predicted. We find that the contributions from σ and ε exchange to binding energy of deltaron are different, that the contribution from ε exchange is negligible, and that σ exchange is dominant. We also find that the binding energy of deltaron is very stable, around several tens of MeV, no matter what kind of mixing is adopted.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/31/1/011401