NMSPEC: A Fortran code for the sparticle and Higgs masses in the NMSSM with GUT scale boundary conditions

NMSPEC is a Fortran code that computes the sparticle and Higgs masses, as well as Higgs decay widths and couplings in the NMSSM, with soft susy breaking terms specified at MGUTMGUT. Exceptions are the soft singlet mass ms2 and the singlet self-coupling κ, that are both determined in terms of the other parameters through the minimization equations of the Higgs potential. We present a first analysis of the NMSSM parameter space with universal susy breaking terms at MGUTMGUT—except for msms and AκAκ—that passes present experimental constraints on sparticle and Higgs masses. We discuss in some detail a region in parameter space where a SM-like Higgs boson decays dominantly into two CP odd singlet-like Higgs states.Program summaryManuscript title: NMSPEC: A Fortran code for the sparticle and Higgs masses in the NMSSM with GUT scale boundary conditionsAuthors: Ulrich Ellwanger, Cyril HugonieProgram title: NMSPECCatalogue identifier: ADZD_v1_0Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADZD_v1_0.htmlProgram obtainable from: CPC Program Library, Queen's University, Belfast, N. IrelandLicensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.htmlNo. of lines in distributed program, including test data, etc.: 121 539No. of bytes in distributed program, including test data, etc.: 1 560 340Distribution format: tar.gzProgramming language: FORTRANComputer: Mac, PC, Sun, Dec, AlphaOperating system: Mac OSC, Linux, Unix, WindowsRAM: 2M bytesKeywords: Supersymmetry, Higgs masses, sparticle masses, NMSSMPACS: 12.60.Jv, 14.80.Cp, 14.80.LyClassification: 11.6Nature of problem: Computation of the Higgs and Sparticle spectrum in the NMSSM with GUT scale boundary conditions, check of theoretical and experimental constraints.Solution method: Integration of the RGEs for all couplings and mass terms from the GUT scale to the Susy scale using a modified Runge–Kutta method; computation and diagonalization of all mass matrices including up to two loop radiative corrections; computation of Higgs decay widths and branching ratios; comparison with exp. bounds from LEPII and the Tevatron.Running time: Less than 1 s per point in parameter space.