Exotic baryon states in QCD sum rule

Abstract

It is shown, that the small decay width of ${\Theta }^{+}=uudd\bar{s}$ baryon is suppressed by chirality violation. It is shown that ${\Theta }^{+}$ decay width $\Gamma$ is proportional to ${\alpha }_s^2<0|\bar{q}q|0{>}^2$, for any pentaquark current without derivatives.

Comments: Talk presented at XYIII International Workshop "High Energy Physics adn Quantum Field Theory" SPB, 17-23June 2004, 6 pages, significantly revised, but all main conclusions and results doesn't change 1Fig