# Madgraph Amplitude Calculator

> MadGraph matrix element calculation skill for BSM physics, cross-section computation, and event generation

- Skill: `a5c-ai/madgraph-amplitude-calculator` (Agent Skill)
- Install (CLI): `npx skillmds@latest add a5c-ai/madgraph-amplitude-calculator`
- Raw SKILL.md: https://api.skillmd.com/api/skills/a5c-ai/madgraph-amplitude-calculator/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: a5c-ai (https://skillmd.com/u/a5c-ai)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/a5c-ai/madgraph-amplitude-calculator

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# MadGraph Amplitude Calculator

## Purpose

Provides expert guidance on MadGraph matrix element calculations for BSM physics, including UFO model import, NLO calculations, and shower matching.

## Capabilities

- UFO model import and validation
- Process generation and optimization
- NLO calculation setup
- Parton-level event generation
- Shower matching with Pythia/Herwig
- Cross-section extraction with uncertainties

## Usage Guidelines

1. **Model Import**: Import UFO models for BSM physics
2. **Process Generation**: Generate matrix elements for desired processes
3. **NLO Corrections**: Configure NLO calculations when needed
4. **Matching**: Set up shower matching for hadronization
5. **Uncertainties**: Evaluate scale and PDF uncertainties

## Tools/Libraries

- MadGraph5_aMC@NLO
- UFO models
- FeynRules