Hyperon–nucleon interaction within chiral effective field theory revisited
By J. Haidenbauer, Ulf-Gerrit Meißner, A. Nogga. European Physical Journal A, 2019
137 citations recorded by the source corpus.
The $$\varLambda N$$ Λ N and $$\varSigma N$$ Σ N interactions are considered at next-to-leading order in SU(3) chiral effective field theory. Different options for the low-energy constants that determine the strength of the contact interactions are explored. Two variants are analysed in detail which yield equivalent results for $$\varLambda N$$ Λ N and $$\varSigma N$$ Σ N scattering observables but differ in the strength of the $$\varLambda N \rightarrow \varSigma N$$ Λ N → Σ N transition potential. The influence of this difference on predictions for light hypernuclei and on the properties of the $$\varLambda $$ Λ and $$\varSigma $$ Σ hyperons in nuclear matter is investigated and discussed. The effect of the variation in the potential strength of the $$\varLambda N$$ Λ N - $$\varSigma N$$ Σ N coupling (also called $$\varLambda -\varSigma $$ Λ - Σ conversion) is found to be moderate for the considered $$^3_\varLambda {{\mathrm{H}}}$$ Λ 3 H and $$^4_\varLambda \mathrm{He}$$ Λ 4 He hypernuclei but sizable in case of the matter properties. Further, the size of three-body forces and their relation to different approaches to hypernuclear interactions is discussed.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/a66b0f4f23a93fd52b0469d2350357ac9e0580ad
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In Nuclear and High Energy Physics
Citations in the corpus
- A Guided Tour of ab initio Nuclear Many-Body Theory (2020, background): “At the top level, we have QCD, followed by EFTs involving hyperons that can be eliminated progressively until we arrive at the “traditional” pionful and pionless chiral EFTs (see references [296, 297] and references therein).”