QCD Sum Rule for $\Lambda$(1405)

Abstract

Motivated by the recently constructed interpolation field for S${}_{11}$(1535), we propose a new interpolating field for $\Lambda$(1405). Using this current, we calculate the mass of $\Lambda$(1405) based on the conventional QCD sum rule analysis. By calculating the Wilson coefficients up to dimension 8 operators and taking into account the mass corrections from s-quark, we find the calculated mass of $\Lambda$(1405) to be very close to its experimental value.

Comments: 8 pages (including one figure), revtex