Infra-red stable fixed points of R-parity violating Yukawa couplings in supersymmetric models

We investigate the infra-red stable fixed points of the Yukawa couplings in the minimal version of the supersymmetric standard model with R-parity violation. Retaining only the R-parity violating couplings of higher generations, we analytically study the solutions of the renormalization group equations of these couplings together with the top- and b-quark Yukawa couplings. We show that only the B-violating coupling #lambda#_2_3_3"'"' approaches a non-trivial infra-red stable fixed point. All other non-trivial fixed point solutions are either unphysical or unstable in the infrared region. (orig.)Available from TIB Hannover: RA 2999(99-019) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman