Papers › Next-to-Minimal SOFTSUSY
Next-to-Minimal SOFTSUSY
B. C. Allanach, P. Athron, Lewis C. Tunstall, A. Voigt, A. G. Williams
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We describe an extension to the SOFTSUSY program that provides for the calculation of the sparticle spectrum in the Next-to-Minimal Supersymmetric Standard Model (NMSSM), where a chiral superfield that is a singlet of the Standard Model gauge group is added to the Minimal Supersymmetric Standard Model (MSSM) fields. Often, a ℤ₃ symmetry is imposed upon the model. SOFTSUSY can calculate the spectrum in this case as well as the case where general ℤ₃ violating (denoted as \-11.0muℤ₃) terms are added to the soft supersymmetry breaking terms and the superpotential. The user provides a theoretical boundary condition for the couplings and mass terms of the singlet. Radiative electroweak symmetry breaking data along with electroweak and CKM matrix data are used as weak-scale boundary conditions. The renormalisation group equations are solved numerically between the weak scale and a high energy scale using a nested iterative algorithm. This paper serves as a manual to the NMSSM mode of the program, detailing the approximations and conventions used.
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