Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2011-12-18
Physics
High Energy Physics
High Energy Physics - Lattice
Talk given at 29th International Symposium on Lattice Field Theory (Lattice 2011), Squaw Valley, Lake Tahoe, California, USA,
Scientific paper
We explore three-nucleon forces (3NF) from lattice QCD simulations. Utilizing the Nambu-Bethe-Salpeter (NBS) wave function, two-nucleon forces (2NF) and 3NF are determined on the same footing. Quantum numbers of the three-nucleon (3N) system are chosen to be (I, J^P)=(1/2,1/2^+) (the triton channel). The enormous computational cost is reduced by employing the simplest geometrical configuration, where 3N are aligned linearly with an equal spacing. We perform lattice QCD simulations using Nf=2 dynamical clover fermion configurations generated by CP-PACS Collaboration, at the lattice spacing of a = 0.156 fm on a 16^3 x 32 lattice with a large quark mass corresponding to m(\pi) = 1.13 GeV. Repulsive 3NF is found at short distance.
Doi Takumi
for HAL QCD Collaboration
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