Difference between revisions of "One-loop provider"
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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. | ||
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
- ↑ The Herwig Collaboration: Herwig 7 installation notes
- ↑ Sherpa contributors: Sherpa 2.2.0 online manual
