Theoretical Status of Pentaquarks

Abstract

We review the current status of the theoretical pentaquark search from the direct QCD calculation. The works from the QCD sum rule and the lattice QCD in the literature are carefully examined. The importance of the framework which can distinguish the exotic pentaquark state (if any) from the NK scattering state is emphasized.Comment: Presented at Yukawa International Seminar (YKIS) 2006 on "New Frontiers in QCD", Kyoto, Japan, 20 Nov. - 8 Dec. 2006, 4 page