Mu problem
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In theoretical physics, the problem is a problem of supersymmetric theories, concerned with understanding the parameters of the theory.
In theoretical physics, the problem is a problem of supersymmetric theories, concerned with understanding the parameters of the theory. Let us assume that the Kahler potential includes a term of the form \ \frac{X}{\ M_\mathsf{pl}\ }\ H_\mathsf{u}\ H_\mathsf{d}\ times some dimensionless coefficient, which is naturally of order one, and where M pl is Planck mass. Then as supersymmetry breaks, gets a non-zero vacuum expectation value ⟨ ⟩ and the following effective term is added to the superpotential: \ \frac{\ \langle F_\mathsf{X} \rangle\ }{\ M_\mathsf{pl}\ }\ H_\mathsf{u}\ H_\mathsf{d}\ , which gives a measured \ \mu = \frac{\ \langle F_\mathsf{X} \rangle\ }{\ M_\mathsf{pl}\ }\ . On the other hand, soft supersymmetry breaking terms are similarly created and also have a natural scale of \ \frac{\ \langle F_\mathsf{X} \rangle\ }{\ M_\mathsf{pl}\ }\ .
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