Difference between revisions of "One-loop provider"

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(Created page with "A '''one-loop provider''' (or '''one-loop program''') is a specialised software for generating one-loop amplitudes for perturbative quantum field theo...")
 
 
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[[Category:Theory software]]
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[[Category:Matrix element generator]]
 
A '''one-loop provider''' (or '''one-loop program''') is a specialised software for generating one-[[Loop|loop]] [[Amplitude|amplitudes]] for [[perturbative quantum field theory]] calculations. They are a special case of [[external amplitude providers]]. One-loop amplitudes contribute to [[next-to-leading order]] (and higher order) [[Cross section|cross sections]] as well as the [[Leading order|leading-order]] cross sections of [[loop-induced]] processes. Most one-loop providers can also compute other amplitudes, but their strength lies in loop amplitudes, which are typically much harder to compute than [[Tree level|tree-level]] amplitudes.
 
A '''one-loop provider''' (or '''one-loop program''') is a specialised software for generating one-[[Loop|loop]] [[Amplitude|amplitudes]] for [[perturbative quantum field theory]] calculations. They are a special case of [[external amplitude providers]]. One-loop amplitudes contribute to [[next-to-leading order]] (and higher order) [[Cross section|cross sections]] as well as the [[Leading order|leading-order]] cross sections of [[loop-induced]] processes. Most one-loop providers can also compute other amplitudes, but their strength lies in loop amplitudes, which are typically much harder to compute than [[Tree level|tree-level]] amplitudes.
  
 
One-loop providers are often used as external software to provide one-loop amplitudes for [[Event generator|event generators]].
 
One-loop providers are often used as external software to provide one-loop amplitudes for [[Event generator|event generators]].
 
  
 
== List of one-loop providers ==
 
== List of one-loop providers ==
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* [[GoSam]]
 
* [[GoSam]]
 
* [[MadGraph5_aMC@NLO]]
 
* [[MadGraph5_aMC@NLO]]
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* [[VBFNLO]]
  
 
== Use from other software ==
 
== Use from other software ==
 
The following event generators use or support the use of external one-loop providers:
 
The following event generators use or support the use of external one-loop providers:
* [[Herwig 7]]<ref>The Herwig Collaboration: [http://herwig.hepforge.org/tutorials/installation/prerequisite.html#external-amplitude-providers Herwig 7 installation notes]</ref>
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* [[Herwig]] 7<ref>The Herwig Collaboration: [http://herwig.hepforge.org/tutorials/installation/prerequisite.html#external-amplitude-providers Herwig 7 installation notes]</ref>
 
* [[Sherpa]]<ref>Sherpa contributors: [http://sherpa.hepforge.org/doc/SHERPA-MC-2.2.0.html#External-one_002dloop-ME Sherpa 2.2.0 online manual]</ref>
 
* [[Sherpa]]<ref>Sherpa contributors: [http://sherpa.hepforge.org/doc/SHERPA-MC-2.2.0.html#External-one_002dloop-ME Sherpa 2.2.0 online manual]</ref>
  
 
== References ==
 
== References ==
 
<references />
 
<references />
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== See also ==
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* [[Two-loop provider]]

Latest revision as of 16:11, 1 August 2017

A one-loop provider (or one-loop program) is a specialised software for generating one-loop amplitudes for perturbative quantum field theory calculations. They are a special case of external amplitude providers. One-loop amplitudes contribute to next-to-leading order (and higher order) cross sections as well as the leading-order cross sections of loop-induced processes. Most one-loop providers can also compute other amplitudes, but their strength lies in loop amplitudes, which are typically much harder to compute than tree-level amplitudes.

One-loop providers are often used as external software to provide one-loop amplitudes for event generators.

List of one-loop providers

Use from other software

The following event generators use or support the use of external one-loop providers:

References

  1. The Herwig Collaboration: Herwig 7 installation notes
  2. Sherpa contributors: Sherpa 2.2.0 online manual

See also