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[Licence| Download | New Version Template] aefi_v1_1.tar.gz(90 Kbytes)
Manuscript Title: 2HDMC - Two-Higgs-Doublet Model Calculator
Authors: David Eriksson, Johan Rathsman, Oscar Stål
Program title: 2HDMC
Catalogue identifier: AEFI_v1_1
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 181(2010)833
Programming language: C++.
Computer: Any computer running Linux.
Operating system: Linux.
RAM: 5 Mb
Keywords: Higgs physics, two-Higgs-doublet model.
Classification: 11.1.

External routines: GNU Scientific Library (http://www.gnu.org/software/gsl/)

Does the new version supersede the previous version?: yes

Nature of problem:
Determining properties of the potential, calculation of mass spectrum, couplings, decay widths, oblique parameters, muon g - 2, and collider constraints in a general two-Higgs-doublet model.

Solution method:
From arbitrary potential and Yukawa sector, tree-level relations are used to determine Higgs masses and couplings. Decay widths are calculated at leading order, including FCNC decays when applicable. Decays to off-shell vector bosons are obtained by numerical integration. Observables are computed (analytically or numerically) as function of the input parameters.

Reasons for new version:
Improved calculation of the oblique parameters.

Summary of revisions:
The computation of the oblique parameters has been improved to give reliable results in the case of degenerate masses for the Higgs bosons. Another issue in the oblique parameter calculation, affecting the numerical values of S, U, V, and X (independently of the Higgs boson masses), has been corrected.

Restrictions:
CP-violation is not treated

Running time:
Less than 0.1 s on a standard PC