|
10.1.2021: GoSam has been upgraded to
python3 and moved to github.
The link below under "Installation" will lead to the new installation script. |
Synopsis
The package GoSam allows for the automated calculation of one-loop amplitudes for multi-particle processes in renormalizable quantum field theories. The amplitudes, which are generated in terms of Feynman diagrams, can be reduced using either D-dimensional integrand-level decomposition or by tensor reduction. GoSam can be used to calculate one-loop QCD and/or electroweak corrections to Standard Model processes and offers the flexibility to link model files for theories Beyond the Standard Model. A standard interface (BLHA1, BLHA2) to programs calculating real radiation is also implemented.
Installation
Download the install script and run it with python3 gosam_installer.py.
For more information see the installation documentation.
Documentation
We refer to the GoSam-2.0 manual. The manual also contains a BLHA-HowTo in section 7.
GoSam Collaboration
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Gudrun Heinrich <gudrun.heinrich@kit.edu>
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Stephen Jones <s.jones@cern.ch>
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Matthias Kerner <mkerner@physik.uzh.ch>
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Vitaly Magerya <vitaly.magerya@tx97.net>
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Pierpaolo Mastrolia <Pierpaolo.Mastrolia@cern.ch>
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Giovanni Ossola <gossola@citytech.cuny.edu>
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Tiziano Peraro <peraro@mpp.mpg.de>
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Johannes Schlenk <johannes.schlenk@psi.ch>
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Ludovic Scyboz <scyboz@mpp.mpg.de>
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Francesco Tramontano <Francesco.Tramontano@cern.ch>
Former members: Mauro Chiesa, Nicolas Greiner, Gavin Cullen, Hans van Deurzen, Stephan Jahn, Gionata Luisoni, Edoardo Mirabella, Joscha Reichel, Thomas Reiter, Johann Felix von Soden-Fraunhofen
Downloads
We recommend the install script to install GoSam.
Here the files for manual installation (2.0-latest refers to the most up-to-date point release):
Python package with GoSam |
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convenience library containing most dependencies |
|
GoSam reference manual |
Examples of processes calculated with GoSam
| Process | MC | Ref |
|---|---|---|
$ pp \rightarrow bbbb$ |
MadGraph/MadDipole/MadEvent |
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$pp \rightarrow W^+W^- + 2 \mbox{ jets (incl massive top loops) }$ |
MG/MD/ME |
|
SUSY QCD corrections to $pp \rightarrow \mbox{neutralino pair}+\mbox{jet} $ |
MG/MD/ME |
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QCD corrections to $pp \rightarrow (\mbox{graviton} \rightarrow \gamma\gamma)+\mbox{jet} $ |
MG/MD/ME |
|
QCD corrections to $pp \rightarrow \gamma\gamma+\mbox{jet}$ |
MG/MD/ME |
|
QCD corrections to $pp \rightarrow \gamma\gamma + 2 \mbox{ jets }$ |
MG/MD/ME |
|
$pp \rightarrow \mbox{Higgs} + 3 \mbox{ jets (gluon fusion) }$ |
MG/MD/ME/Sherpa |
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$pp \rightarrow \mbox{Higgs} + 2 \mbox{ jets (gluon fusion) }$ |
Sherpa |
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$pp \rightarrow t \,\bar t + 0,1 \mbox{ jets }$ |
Sherpa |
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$pp \rightarrow \mbox{Higgs} \, t \,\bar t + 1 \mbox{jet}$ |
Sherpa |
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$pp \rightarrow W^+W^- b \bar b$ |
Sherpa |
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$pp \rightarrow W + 0,1,2 \mbox{ jets }$ |
Sherpa |
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$pp \rightarrow Z/\gamma^* + 0,1 \mbox{ jets }$ |
Sherpa |
|
$pp \rightarrow W b \,\bar b $ |
Sherpa |
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$pp \rightarrow W^+W^- $ |
Sherpa |
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$pp \rightarrow W^+W^+ + 2 \mbox{ jets }$ |
Sherpa |
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$pp \rightarrow Z + 1,2,3 \mbox{jets (EW corrections)}$ |
||
$pp \rightarrow H W/ H Z + 0,1 \mbox{jet} $ |
Powheg |
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$pp \rightarrow $ top-philic resonance |
MadGraph/MadDipole/MadEvent |
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$pp \rightarrow Wb\,\bar b + 1\, \mbox{jet} $ |
Powheg |
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$pp \rightarrow HH j j$ |
MadGraph/MadDipole/MadEvent |
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$pp \rightarrow W + 2\, \mbox{jets}$ (EW corrections) |
MadGraph/MadDipole/MadEvent |
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$pp \rightarrow t\bar{t}\gamma\gamma |
MadGraph5@NLO |
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$gg \rightarrow VV$ in THDM (interference h - H) |
MadGraph/MadDipole/MadEvent |
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$pp \rightarrow W^+W^-$ + dim 8 operators |
Herwig7 |
Publications
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Gavin Cullen, Hans van Deurzen, Nicolas Greiner, Gudrun Heinrich, Gionata Luisoni, Pierpaolo Mastrolia, Edoardo Mirabella, Giovanni Ossola, Tiziano Peraro, Johannes Schlenk, Johann Felix von Soden-Fraunhofen, Francesco Tramontano, "GoSam-2.0: a tool for automated one-loop calculations within the Standard Model and Beyond", arXiv:1404.7096 [hep-ph].
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Gavin Cullen, Nicolas Greiner, Gudrun Heinrich, Gionata Luisoni, Pierpaolo Mastrolia, Giovanni Ossola, Thomas Reiter, Francesco Tramontano, "Automated One-Loop Calculations with GoSam", arXiv:1111.2034 [hep-ph].