New Developments in FormCalc 4.1

T. Hahn

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New Developments in FormCalc 4.1

T. Hahn

High Energy Physics - Phenomenology · Submitted 21 Jun 2005

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim Major new or enhanced features in Version 4.1 are: treatment of external fermions, phase-space integration, code-generation functions, extensions for the MSSM, the HadCalc frontend.

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The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 2,946 input tokens, $0.0001 reported.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.09 · human participants 0.02 · controlled comparison 0.01 · randomized assignment 0.01 · states quantitative result 0.04 · compares with prior results 0.08 · mentions code or data availability 0.22.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; show every role.

FormCalc is a matrix-element generator that turns FeynArts amplitudes up to one loop into a Fortran code for computing the squared matrix element. The generated code can be run with FormCalc's own driver programs or used with other `frontends', e.g. Monte Carlos. Major new or enhanced features in Version 4.1 are: treatment of external fermions, phase-space integration, code-generation functions, extensions for the MSSM, the HadCalc frontend.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	FormCalc is a matrix-element generator that turns FeynArts amplitudes up to one loop into a Fortran code for computing the squared matrix element.	background 0.70	0.18	0.09	asserted 1.00
s1	The generated code can be run with FormCalc's own driver programs or used with other `frontends', e.g. Monte Carlos.	method 0.62	0.25	0.06	asserted 0.97
s2	Major new or enhanced features in Version 4.1 are: treatment of external fermions, phase-space integration, code-generation functions, extensions for the MSSM, the HadCalc frontend.	contribution 1.00	0.72	0.34	asserted 0.99

What kind of paper the classifier reports this is: method or tool 1.00 · evidence from simulation or computation 0.65.

What was examined, and what was not

sources read

arXiv listing abstract v1

not examined

full text
figures and tables
references and citing sentences
relations to other papers

levels run

P abstract

not run

S sections
T body sentences
C citations
R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper

Original abstract

FormCalc is a matrix-element generator that turns FeynArts amplitudes up to one loop into a Fortran code for computing the squared matrix element. The generated code can be run with FormCalc's own driver programs or used with other `frontends', e.g. Monte Carlos. Major new or enhanced features in Version 4.1 are: treatment of external fermions, phase-space integration, code-generation functions, extensions for the MSSM, the HadCalc frontend.

Human review

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References

Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

WCxf: an exchange format for Wilson coefficients beyond the Standard Model
hep-ph 2017-12 accept novelty 6.0 of 10

WCxf provides a YAML/JSON exchange format for Wilson coefficients, with predefined SMEFT and WET bases, a Python package, and interfaces to several public HEP codes.
Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions
hep-ph 2014-08 conditional novelty 6.0 of 10

Adding all supersymmetric and non-supersymmetric loop contributions at once, rather than the dominant one alone, can reduce predicted lepton-flavor-violating rates by up to an order of magnitude in the supersymmetric ...
A Flavor Kit for BSM models
hep-ph 2014-05 conditional novelty 6.0 of 10

The authors release an automated pipeline (PreSARAH, SARAH, SPheno) that derives one-loop Wilson coefficients for a fixed operator list and turns them into numerical predictions for about twenty flavor observables in ...
The Quartic Higgs Coupling at Hadron Colliders
hep-ph 2005-07 conditional novelty 6.0 of 10

A one-loop calculation of triple Higgs production at hadron colliders shows the quartic Higgs self-coupling shifts the rate by under 20 percent, too little to disentangle from the much larger trilinear dependence.
Vector-Boson Fusion and Vector-Boson Scattering
hep-ph 2016-10 accept novelty 3.0 of 10

A structured review of LHC vector-boson fusion and scattering covering signatures, higher-order corrections, parton-shower matching, anomalous gauge couplings, unitarization prescriptions, and the experimental status ...

How the literature uses it

6 arXiv papers cite this in 8 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 1 sentence without a confident label

Uses its method or tool 4 papers

The calculation of the cross section is performed by using the FeynArts, FormCalc, and LoopTools packages [ref] .

Production of Single Heavy Charged Leptons at a Linear Collider · Sequential Standard Model · 1.00
Furthermore, also makes use of / [ref] to compute generic expressions for the required Wilson coefficients at the tree- and 1-loop levels.

FlavorKit: a brief overview · FlavorKit · 1.00
This setup makes use of FeynArts/FormCalc [ref] to compute generic predictions for the form factors of the relevant operators and thus provides an automatic computation of the flavor observables.

Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions · Introduction · 1.00

Compares with it 1 paper

I compare the performance of HEPMath with FormCalc [ref] and MadLoop [ref] .

HEPMath 1.4: A Mathematica Package for Semi-Automatic Computations in High Energy Physics · Performance · 0.98

Cites it as background 1 paper

At the lowest order in the perturbative expansion of a scattering amplitude one obtains only tree-like diagrams and various automated tools exist to generate and evaluate lo matrix elements numerically [ref] .

Automated Evaluation of One-Loop Six-Point Processes for the LHC · Introduction · 0.92

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