Realistic nuclear matrix elements for the lepton-flavor violating mu(-)-> e(-) conversion in Al-27 and Ti-48 - art. no. 035502

Coherent and incoherent mu(-)-->e(-) conversion channels in Al-27 and Ti-48 targets are investigated in detail. We present the results for the transit ion matrix elements of the conversion operators constructed in the conventi onal extensions of the standard model as well as supersymmetric theories. T he nucleus Al-27 has recently been employed as a target in a new mu(-)-->e( -) conversion experiment (MECO) at Brookhaven with the aim to search for ph ysics beyond the standard model at a relative sensitivity 10(-17). Based on our calculated transition matrix elements, this experiment will lead to ve ry severe constraints fur the flavor violation parameters. For Ti-48, which is currently used as a target in the new run of the SINDRUM II experiment at PSI, we use the most recent experimental data to extract new limits for the lepton flavor nonconservation. We have also evaluated separately the is oscalar and isovector contributions to the mu(-)-->e(-) conversion.