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Unitary ambiguity of NN contact interactions and the 3N force
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Unitary ambiguity of NN contact interactions and the 3N force
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We identify a redundancy between two- and three-nucleon contact interactions at the fourth and fifth order of the chiral expansion respectively. In particular we show that tensor-type and spin-orbit three-nucleon contact interactions effectively account for that part of the two-nucleon interaction which depends on the total center-of-mass momentum and is unconstrained by relativity. This might give the chiral effective field theory enough flexibility to successfully address $A=3$ scattering observables already at N3LO.
Forward citations
Cited by 1 Pith paper
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Spectroscopic basis for short-range three-nucleon forces
A spectroscopic reparametrization of N4LO contact three-nucleon forces lets nine of thirteen LECs be determined from elastic nucleon-deuteron scattering via an RBF emulator.
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