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arXiv · 2208.02388

Partial-wave expansion of $\Lambda NN$ three-baryon interactions in chiral effective field theory

M. Kohno·H. Kamada·K. Miyagawa
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Abstract

An expression of partial wave expansion of three-baryon interactions in chiral effective field theory is presented. The derivation follows the method by Hebeler et al. [Phys. Rev. C{\bf 91}, 044001 (2015)], but the final expression is more general. That is, a systematic treatment of the higher-rank spin-momentum structure of the interaction becomes possible. Using the derived formula, a $\Lambda$-deuteron folding potential is evaluated. This information is valuable for inferring the possible contribution of the $\Lambda NN$ three-baryon forces to the hypertriton as the basis of further studies by sophisticated Faddeev calculations. A microscopic understanding of $\Lambda NN$ three-baryon forces together with two-body $\Lambda N$ interactions is essential for the description of hypernuclei and neutron-star matter.

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M. Kohno, H. Kamada, K. Miyagawa. 2022-08-04. Partial-wave expansion of $\Lambda NN$ three-baryon interactions in chiral effective field theory. https://doi.org/10.1103/physrevc.106.054004

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