Abstract
The Jülich-Bonn-Munich Group has performed extensive studies of baryon-baryon interactions involving strange baryons (\(\varLambda \), \(\varSigma \), \(\varXi \)) within chiral effective field theory (EFT). A selection of the achieved results is presented. In particular, a calculation of the in-medium properties of a hyperon-nucleon interaction derived within chiral EFT and fitted to \(\varLambda N\) and \(\varSigma N\) scattering data is reviewed. Implications on the properties of neutron stars and, specifically, on the so-called hyperon-puzzle are addressed. In addition, results for baryon-baryon scattering in the strangeness \(S=-2\) sector, obtained at next-to-leading order in the chiral expansion, are presented.
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Acknowledgements
I would like to thank N. Kaiser, U.-G. Meißner, A. Nogga, S. Petschauer, and W. Weise for collaborating on the topics covered by my talk. This work is supported in part by the DFG and the NSFC through funds provided to the Sino-German CRC 110 “Symmetries and the Emergence of Structure in QCD” (DFG grant. no. TRR 110).
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Haidenbauer, J. (2020). Baryon-Baryon Interaction in Chiral Effective Field Theory. In: Orr, N., Ploszajczak, M., Marqués, F., Carbonell, J. (eds) Recent Progress in Few-Body Physics. FB22 2018. Springer Proceedings in Physics, vol 238. Springer, Cham. https://doi.org/10.1007/978-3-030-32357-8_143
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DOI: https://doi.org/10.1007/978-3-030-32357-8_143
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