Abstract

FORKEL, Hilmar; NAVARRA, Fernando S.  and  NIELSEN, Marina. Instanton effects in heavy lambda masses. Braz. J. Phys. [online]. 2001, vol.31, n.1, pp. 71-76. ISSN 0103-9733.  http://dx.doi.org/10.1590/S0103-97332001000100013.

We calculate the masses of L_b and L_c in the framework of QCD sum rules including instanton contributions. We find that these contributions have the same size of the four quark condensate contribution and improve the Borel stability in both Dirac structures of the baryon correlation function.