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Manuscript Title: Vscape V1.1.0 An Interactive Tool for Metastable Vacua
Authors: Korneel van den Broek
Program title: Vscape 1.1.1
Catalogue identifier: ADZW_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 178(2008)52
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.
Word size: 32 bits
Keywords: Coleman-Weinberg effective potential, metastable supersymmetry breaking, phenomenological model, beyond standard model, elementary particle physics, numerical differentiation.
PACS: 11.30.Pb, 11.30.Qc, 12.60Jv.
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.

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.