FIG. 1: LFV branching ratios as a function of v/ Λ for the scan described in the text. µ → eee is plotted on the top-left panel, µ − e conversion in nuclei on the top-right one, and µ → eγ on the two lower panels (any v/ Λ value on the left panel and small v/ Λ values on the right one). The horizontal lines correspond to the current experimental upper bound (solid) and future sensitivity (dashed). TABLE II: Percentage of points that satifies all experimental tests (including the projected MEG sensitivity on the last column) for different parameter intervals. 26 constraint all tests all tests + MEG c$_{3}$ ≥ 0 . 5, v Λ ≤ 0 . 05 60% 28% c$_{3}$ ≥ 0 . 55, v Λ ≤ 0 . 15 65% 31% c$_{3}$ ≥ 0 . 55, v Λ ≤ 0 . 05 91% 53% . . v/ Λ B ( µ → 3 e ) 1 0.8 0.6 0.4 0.2 0 10 $_{−}$6 10 $_{−}$8 10 $_{−}$10 10 $_{−}$12 10 $_{−}$14 10 $_{−}$16 10 $_{−}$18 10 $_{−}$20 10 $_{−}$22 10 $_{−}$24 10 $_{−}$26 . . v/ Λ B conv 1 0.8 0.6 0.4 0.2 0 10 $_{−}$6 10 $_{−}$8 10 $_{−}$10 10 $_{−}$12 10 $_{−}$14 10 $_{−}$16 10 $_{−}$18 10 $_{−}$20 10 $_{−}$22 10 $_{−}$24 10 $_{−}$26 . . v/ Λ B ( µ → eγ ) 1 0.8 0.6 0.4 0.2 0 10 0 10 $_{−}$5 10 $_{−}$10 10 $_{−}$15 10 $_{−}$20 10 $_{−}$25 . . v/ Λ B ( µ → eγ ) 0.1 0.08 0.06 0.04 0.02 0 10 0 10 $_{−}$5 10 $_{−}$10 10 $_{−}$15 10 $_{−}$20 10 $_{−}$25