- #1
touqra
- 284
- 0
Can anyone recommend a good Feynman diagram calculator ?
What are some recommended Feynman diagram calculators?
- Context: Graduate
- Thread starter touqra
- Start date
Click For Summary
Discussion Overview
The discussion centers around recommendations for Feynman diagram calculators, exploring various software options that can generate diagrams or provide corresponding expressions. Participants share their experiences with different tools and the complexities involved in using them for calculations in particle physics.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant inquires about the type of Feynman diagram calculator needed, whether for generating diagrams or obtaining expressions.
- Another participant mentions that while there are software packages available, they have found manual calculations to be more effective for their needs, though they acknowledge the complexity of numerical calculations for advanced scenarios.
- CalcHEP is recommended as a tool that can handle calculations from Feynman rules to cross sections and event generation, with a suggestion to have a theorist prepare models.
- MadGraph is noted as an online tool, while LanHEP is mentioned as a coding option for calculations.
- A participant lists several preferred codes, including MadGraph/MadEvent, FeynArts/FormCalc, WHIZARD, and CalcHEP/CompHEP, highlighting their numerical and analytical capabilities.
- FeynRules is suggested for deriving Feynman rules from Lagrangians or extracting model files for use with other software.
Areas of Agreement / Disagreement
Participants express a variety of opinions on the effectiveness of different software tools, indicating that there is no consensus on a single best option. Some participants favor manual calculations, while others advocate for specific software packages, reflecting differing experiences and preferences.
Contextual Notes
Participants note that each software has different strengths and weaknesses, and the choice of tool may depend on the specific requirements of the calculations being performed.
Who May Find This Useful
This discussion may be useful for physicists, students, and researchers interested in computational tools for particle physics, particularly those looking for recommendations on Feynman diagram calculators.
- #2
CompuChip
Science Advisor
Homework Helper
- 4,305
- 49
You mean that gives you the expression corresponding to a Feynman diagram? Or one that generates Feynman diagrams for you?
In both cases I know of some packages floating around, for example for Mathematica... when I was first introduced to calculations with Feynman diagrams I have also tried to find such software, but frankly so far I haven't found anything which beats manual calculation.
I know that there is software that will do it though (if you want to numerically calculate two-loop corrections to some propagator in the Standard Model, anything beats manual calculation
) although I suspect it is rather complicated and highly specialized.
In both cases I know of some packages floating around, for example for Mathematica... when I was first introduced to calculations with Feynman diagrams I have also tried to find such software, but frankly so far I haven't found anything which beats manual calculation.
I know that there is software that will do it though (if you want to numerically calculate two-loop corrections to some propagator in the Standard Model, anything beats manual calculation
) although I suspect it is rather complicated and highly specialized.- #3
bomanfishwow
- 27
- 0
CalcHEP (http://theory.sinp.msu.ru/~pukhov/calchep.html) will take you from the Feynman rules to calculations of cross sections, distributions, event generation etc. However, I suggest a tame theorist / phenomenologist to prepare models for you!
- #4
K.J.Healey
- 622
- 0
For online:
MadGraph
http://madgraph.hep.uiuc.edu/
For code:
LanHEP
http://theory.sinp.msu.ru/~semenov/lanhep.html
MadGraph
http://madgraph.hep.uiuc.edu/
For code:
LanHEP
http://theory.sinp.msu.ru/~semenov/lanhep.html
- #5
BenjF
- 5
- 0
There exists a lot of codes, each of them having different strengths and weaknesses. Here are my preferred ones:
MadGraph/MadEvent: http://madgraph.phys.ucl.ac.be/ (numerical code)
FeynArts/FormCalc: http://www.feynarts.de/ (analytical or numerical code)
WHIZARD: http://whizard.event-generator.org (numerical code)
CalcHEP/CompHEP: http://theory.sinp.msu.ru/~pukhov/calchep.html (numerical code)
And if you want to derive Feynman rules from any Lagrangian or extract the corresponding model files for some of the codes above, you can use FeynRules: http://feynrules.phys.ucl.ac.be/
CheersBenj
MadGraph/MadEvent: http://madgraph.phys.ucl.ac.be/ (numerical code)
FeynArts/FormCalc: http://www.feynarts.de/ (analytical or numerical code)
WHIZARD: http://whizard.event-generator.org (numerical code)
CalcHEP/CompHEP: http://theory.sinp.msu.ru/~pukhov/calchep.html (numerical code)
And if you want to derive Feynman rules from any Lagrangian or extract the corresponding model files for some of the codes above, you can use FeynRules: http://feynrules.phys.ucl.ac.be/
CheersBenj
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