ar X iv : h ep - p h / 05 11 32 0 v 1 2 9 N ov 2 00 5 A Note on Fine – Tuning in Mirage Mediation ∗

Recent progress in string theory moduli stabilization has motivated a mixed modulus–anomaly mediated supersymmetry breaking scenario, also dubbed ‘mirage mediation’. This scenario has a number of phenomenologically attractive features, in particular with respect to the cosmological gravitino/moduli problem. In this note, we investigate the issues of fine–tuning associated with obtaining the correct electroweak symmetry breaking scale in the mirage mediation scenario. We find that, due to lighter gluinos, the fine–tuning is smaller than that in other mediation mechanisms.