Retrofitting and the μ Problem

One of the challenges of supersymmetry (SUSY) breaking and mediation is generating a μ term consistent with the requirements of electro-weak symmetry breaking. The most common approach to the problem is to generate the μ term through a SUSY breaking F-term. Often these models produce unacceptably large Bμ terms as a result. We will present an alternate approach, where the μ term is generated directly by non-perturtative effects. The same non-perturbative effect will also retrofit the model of SUSY breaking in such a way that μ is at the same scale as masses of the Standard Model superpartners. Because the μ term is not directly generated by SUSY breaking effects, there is no associated Bμ problem. These results are demonstrated in a toy model where a stringy instanton generates μ.