Vscape V1.1.0. An interactive tool for metastable vacua

Abstract

Vscape is an interactive tool for studying the one-loop effective potential of an ungauged supersymmetric model of chiral multiplets. The program allows the user to define a supersymmetric model by specifying the superpotential. The F-terms and the scalar and fermionic mass matrices are calculated symbolically. The program then allows you to search numerically for (meta)stable minima of the one-loop effective potential. Additional commands enable you to further study specific minima, by, e.g., computing the mass spectrum for those vacua. Vscape combines the flexibility of symbolic software, with the speed of a numerical package. Program summary Program title: Vscape 1.1.1 Catalogue identifier: ADZW_v1_0 Program summary URL: http://cpc.cs.qub.ac.uk/summaries/ADZW_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html No. of lines in distributed program, including test data, etc.: 80 507 No. of bytes in distributed program, including test data, etc.: 6 708 938 Distribution format: tar.gz Programming language: C++ Computer: Pentium 4 PC Computers: need (GNU) C++ compiler, Linux standard GNU installation (./configure; make; make install). A precompiled Windows XP version is included in the distribution package Operating system: Linux, Windows XP using cygwin RAM: 10 MB Word size: 32 bits Classification: 11.6 External routines: GSL ( http://www.gnu.org/software/gsl/), CLN ( http://www.ginac.de/CLN/), GiNaC ( http://directory.fsf.org/GiNaC.html) Nature of problem: Vscape is an interactive tool for studying the one-loop effective potential of an ungauged supersymmetric model of chiral multiplets. The program allows the user to define a supersymmetric model by specifying the superpotential. The F-terms and the scalar and fermionic mass matrices are calculated symbolically. The program then allows you to search numerically for (meta)stable minima of the one-loop effective potential. Additional commands enable you to further study specific minima, by, e.g., computing the mass spectrum for those vacua. Vscape combines the flexibility of symbolic software with the speed of a numerical package. Solution method: Coleman–Weinberg potential is computed using numerical matrix diagonalization. Minima of the one-loop effective potential are found using the Nelder and Mead simplex algorithm. The one-loop effective potential can be studied using numerical differentiation. Symbolic users interface implemented using flex and bison. Restrictions: N = 1 supersymmetric chiral models only Unusual features: GiNaC (+CLN), GSL, ReadLib (not essential) Running time: Interactive users interface. Most commands execute in a few ms. Computationally intensive commands execute in order of minutes, depending on the complexity of the user defined model.