出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Two of recent progress in lattice QCD approach to nuclear force are reported. (i) Tensor force
from quenched lattice QCD: By truncating the derivative expansion of inter-nucleon potential to
the strictly local terms, we obtain central force VC r
and tensor force VT r
separately from swave
and d-wave components of Bethe-Salpeter wave function for two nucleon state with JP
1
. Numerical calculation is performed with quenchedQCD on 324 lattice using the standard plaquette
action at b 5
7 with the standard Wilson quark action with k 0
1640
0
1665
0
1678.
Preliminary results show that the depths of the resulting tensor force amount to 20 to 40 MeV,
which is enhanced in the light quark mass region. (ii) Nuclear force from 2+1 avor QCD with
PACS-CS gauge conguration: Preliminary full QCD results are obtained by using 2+1 avor
gauge congurations generated by PACS-CS collaboration. The resulting potential has the midium
range attraction of about 30 MeV similar to the preceding quenched calculations. However,
the repulsive core at short distance is signicantly stronger than the corresponding quenchedQCD
result.
