Possibility of a new neutral hypernucleus 4ΛΛn = (n,n, Λ, Λ)

3rd International Workshop on "State of the Art in Nuclear Cluster Physics"

Richard, Jean-Marc^1 ; Wang, Qian^2 ; Zhao, Qiang^3

Université de Lyon, Institut de Physique Nucléaire, UCBL-IN2P3-CNRS, rue Enrico Fermi 4, Villeurbanne, France^1

Institut für Kernphysik, Institute for Advanced Simulation, Jülich Center for Hadron Physics, Jülich

D-52425, Germany^2

Institute of High Energy Physics and Theoretical Physics, Center for Science Facilities, Chinese Academy of Sciences, Beijing

z100049, China^3

关键词: Baryon-baryon interactions;    Chiral effective-field theory;    Hypernuclei;    Tensor force;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/569/1/012079/pdf
DOI  :  10.1088/1742-6596/569/1/012079

来源: IOP

【 摘 要 】

The status of the light hypernuclei is reviewed, and discussed with models based either on the Nijmegen-RIKEN baryon-baryon interaction or on recent studies using chiral effective field theory. The latter suggests a significantly shorter range for the ΛΛ interaction, and this favours the formation of a Borromean state made of two neutrons and two hyperons. Various corrections are discussed, in particular the coupling of NΛ to NΣ, or of ΛΛ to NΞ, and the role of tensor forces. The new nucleus4ΛΛn (n,n, Λ, Λ) could be produced in various reactions, in particular deuteron-deuteron scattering with the simultaneous production of two charged kaons, for which an estimate of the cross section is provided.