5 research outputs found
SFOLD - a program package for calculating two-body sfermion decays at full one-loop level in the MSSM
SFOLD (Sfermion Full One Loop Decays) is a Fortran program package for
calculating all sfermion two-body decay widths and the corresponding branching
ratios at full one-loop level within the MSSM. The package adopts the SUSY
Parameter Analysis convention and supports the SUSY Les Houches Accord input
and output format. With the SFOLD package we found non-negligible electroweak
corrections in bosonic decays of sbottom, stop and stau.Comment: 17 pages, 3 figure
Computing decay rates for new physics theories with FeynRules and MadGraph5/aMC@NLO
We present new features of the FeynRules and MadGraph5/aMC@NLO programs for
the automatic computation of decay widths that consistently include channels of
arbitrary final-state multiplicity. The implementations are generic enough so
that they can be used in the framework of any quantum field theory, possibly
including higher-dimensional operators. We extend at the same time the
conventions of the Universal FeynRules Output (or UFO) format to include decay
tables and information on the total widths. We finally provide a set of
representative examples of the usage of the new functions of the different
codes in the framework of the Standard Model, the Higgs Effective Field Theory,
the Strongly Interacting Light Higgs model and the Minimal Supersymmetric
Standard Model and compare the results to available literature and programs for
validation purposes.Comment: 32 pages, 2 figures. Published versio
SFOLD — A program package for calculating two-body sfermion decays at full one-loop level in the MSSM
This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)
Abstract
SFOLD (Sfermion Full One-Loop Decays) is a Fortran program package for calculating all sfermion two-body decay widths and the corresponding branching ratios at full one-loop level within the MSSM. The package adopts the SUSY Parameter Analysis convention and supports the SUSY Les Houches Accord input and output format. With the SFOLD package we found non-negligible electroweak corrections in bosonic decays of b ̃ , t ̃ and τ ̃ .
Title of program: SFOLD
Catalogue Id: AEMZ_v1_0
Nature of problem
If the MSSM is realized in nature, LHC will produce supersymmetric particles copiously. The best environment for a precise determination of the model parameters would be a high energy e + e - linear collider. Experimental accuracies are expected at the per-cent down to the per-mill level. These must be matched from the theoretical side. Therefore loop calculations are mandatory.
Versions of this program held in the CPC repository in Mendeley Data
AEMZ_v1_0; SFOLD; 10.1016/j.cpc.2012.05.02
Computing decay rates for new physics theories with FeynRules and MadGraph 5_aMC@NLO
We present new features of the FeynRules and MadGraph 5_aMC@NLO programs for the automatic computation of decay widths that consistently include channels of arbitrary final-state multiplicity. The implementations are generic enough so that they can be used in the framework of any quantum field theory, possibly including higher-dimensional operators. We extend at the same time the conventions of the Universal FeynRules Output (or UFO) format to include decay tables and information on the total widths. We finally provide a set of representative examples of the usage of the new functions of the different codes in the framework of the Standard Model, the Higgs Effective Field Theory, the Strongly Interacting Light Higgs model and the Minimal Supersymmetric Standard Model and compare the results to available literature and programs for validation purposes
Precision tools and models to narrow in on the 750 GeV diphoton resonance
The hints for a new resonance at 750 GeV from ATLAS and CMS have triggered a
significant amount of attention. Since the simplest extensions of the standard
model cannot accommodate the observation, many alternatives have been
considered to explain the excess. Here we focus on several proposed
renormalisable weakly-coupled models and revisit results given in the
literature. We point out that physically important subtleties are often missed
or neglected. To facilitate the study of the excess we have created a
collection of 40 model files, selected from recent literature, for the
Mathematica package SARAH. With SARAH one can generate files to perform
numerical studies using the tailor-made spectrum generators FlexibleSUSY and
SPheno. These have been extended to automatically include crucial higher order
corrections to the diphoton and digluon decay rates for both CP-even and CP-odd
scalars. Additionally, we have extended the UFO and CalcHep interfaces of
SARAH, to pass the precise information about the effective vertices from the
spectrum generator to a Monte-Carlo tool. Finally, as an example to demonstrate
the power of the entire setup, we present a new supersymmetric model that
accommodates the diphoton excess, explicitly demonstrating how a large width
can be obtained. We explicitly show several steps in detail to elucidate the
use of these public tools in the precision study of this model.Comment: 184 pages, 24 figures; model files available at
http://sarah.hepforge.org/Diphoton_Models.tar.gz; v2: added a few
clarifications and reference