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Leading three-baryon forces from SU(3) chiral effective field theory

S. Petschauer,
N. Kaiser,
J. Haidenbauer,
U.-G. Meissner,
W. Weise
Leading three-baryon forces are derived within SU(3) chiral effective field theory. Three classes of irreducible diagrams contribute: three-baryon contact terms, one-meson exchange and two-meson exchange diagrams. We provide the minimal non-relativistic terms of the chiral Lagrangian, that contribute to these diagrams. SU(3) relations are given for the strangeness S=0 and -1 sectors. In the strangeness-zero sector we recover the well-known three-nucleon forces from chiral effective field theory. Explicit expressions for the lambda-nucleon-nucleon chiral potential in isospin space are presented.
Date of publication: 
Published in: 
Physical Review C93 (2016) 014001