Phenomenology of the Λ/Σproduction ratio in pp collisions A. Sibirtsev, J. Haidenbauer, H. -W. Hammer and U. -G. Meißner Eur. Phys. J. A, 29 3 (2006) 363-367 Published online: 25 September 2006 DOI: 10.1140/epja/i2006-10097-5