Brazilian Journal of Physics
Print version ISSN 0103-9733
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 Lb and Lc 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.