# Sho's website

## FeynLecture: Tools for BSM Physics

Lecture slides
https://misho104.github.io/FeynLecture/
Materials for “Lecture A”
https://github.com/misho104/FeynLecture
http://bit.ly/MishoFeynLecture

### Overview

This is an introductory course of computer-based collider physics.

This course consists of two lectures. Lecture A focuses on how to use the FeynArts+FormCalc+LoopTools suite, which is widely used for automatic calculation of scattering amplitudes, as well as FeynRules, which helps to express your model (Lagrangian) in computer codes.

Lecture B is a very basic introduction of MadGraph5, i.e., collider simulation. A brief introduction of how to analyze the generated events using Python codes are also included.

#### Goal

In Lecture A, you will learn how to automate your Feynman-diagram calculation.

• Using FeynArts, you can automatically generate Feynman diagrams for any Standard Model processes.
• Using FormCalc, you can automatically calculate the tree-level amplitudes of 2-to-2 Standard Model processes.
• Using FormCalc and LoopTools, you can automatically calculate 1-loop level amplitudes of simple Standard Model processes.
• You have a basic idea of how to implement your model with FeynRules.
• You can perform the amplitude calculation above with your implemented FeynRules model.

In Lecture B, you will learn the basic idea of collider simulation using MadGraph5.

• You can explain what the term “Monte Carlo simulation” means.
• You can calculate the cross section of basic Standard Model process.
• With FeynRules, you can calculate the cross section of simple processes in (theoretically-) “any” models.
• You have a basic understanding of [[Pythia]]/[[Delphes]] detector simulation.
• You can invoke [[Pythia]]/[[Delphes]] detector simulation.
• You have a basic idea of how to analyze the generated events, using [[Python]].

#### Historical Information

Lecture A is based on the lecture I gave in February 2012 at Osaka University with request from Odakin. It was designed as 2.5 days lecture, and it took 16 hours including the environment set-up.

Then, in October 2016 I was asked by Seong Chan to give a 4-day lecture course in Yonsei University, when I also include Lecture B.

### Lecture Materials

Lecture slides are summarized in GitHub Page. Materials for “Lecture A” is maintained on GitHub. See releases for archive files.

#### Lecture A: Automated analytic calculation of matrix elements

• Lecture 0 : Mathematica Basic
• Lecture 1 : Tree-level Calculation with FeynArts / FormCalc
• Lecture1-1.nb: the very first step $e^-e^+\to\mu^-\mu^+$ in QED
• Lecture1-2.nb: do it again! : $e^-\mu^-\to e^-\mu^-$ in QED
• Lecture1-3.nb: and again! : $e^+ e^- \to \gamma \gamma$ in QED
• Lecture1-4.nb: All about tree-level : QCD processes
• Lecture1-ex.nb: Exercises
• Lecture1-ex-ex.nb: Extra Exercises
• Lecture 2 : To Create a New Model File with FeynRules
• Lecture 3 : Loop-level calculation
• Lecture3-1.nb: a simple (but uneasy and subtle) example “QCD box diagrams”
• Lecture3-hgg.nb: phenomenologically interesting example $h\to\gamma\gamma$
• Lecture3-ex-eevh.nb: Exercises $e^+e^-\to Vh$

#### Lecture B: Monte Carlo simulation

• Lecture 0 : What is Monte Carlo simulation?
• Lecture 1 : MadGaraph5 basic
• $pp→t\bar t$, the most boring example
• Theoretical knowledge
• Lecture 2 : MadGaraph5 basic-plus
• How to use other models?
• MSSM cross sections
• Lecture 3 : Detector simulation with Pythia-PGS + Delphes
• Lecture 4 : Analysis

### Schedule

#### Oct. 2016 Yonsei University

Oct. 11 (Tue) 10:00‒12:00 (615B)
Installation help-desk (Lecture 0: precourse work)
Oct. 11 (Tue) 17:00‒19:00 (352)
Lecture A-1: FA+FC Tree-level amplitude
Oct. 12 (Wed) 10:00‒12:00 (B101)
Lecture B-1: MG5 Standard Model Tree-level
Oct. 12 (Wed) 17:00‒19:00 (352)
Lecture A-2: FeynRules for your own model
Oct. 13 (Thu) 10:00‒12:00 (615B)
Lecture B-2: MG5 for other models
Oct. 13 (Thu) 17:00‒19:00 (352)
Lecture A-3: LoopTools
Oct. 14 (Fri) 10:00‒12:00 (615B)
extra topics? (CheckMATE / MadAnalysis / SM.fr)
Oct. 14 (Fri) 17:00‒19:00 (352)
extra topics? (CheckMATE / MadAnalysis / SM.fr)

#### Feb. 2012 Osaka University

Feb. 8 (Wed) morning
Installation help-desk and Lecture 0: precourse work
Feb. 8 (Wed) afternoon + Feb. 9 (Thu) morning
Lecture A-1: FA+FC Tree-level amplitude
Feb. 9 (Thu) afternoon + Feb. 10 (Fri) morning
Lecture A-2: FeynRules for your own model
Feb. 10 (Fri) afternoon
Lecture A-3: LoopTools

### Installation Tips

As you know, you have to AppendTo[$Path, /the/directory/of/the/packages] to use FeynArts etc. You can use this$Path as the default configuration if you add these commands into the "initialization file" found in $HOME/.Mathematica/Kernel/init.m,$HOME/Library/Mathematica/Kernel/init.m, etc. (depending on the platform).

Actually I installed all the packages I use in $HOME/Documents/Mathematica/lib/, and wrote the following commands in init.m: Global$LibDirectory=FileNameJoin[{$HomeDirectory, "Documents", "Mathematica", "lib"}] AppendTo[$Path, Global$LibDirectory];$Path = Join[$Path, Select[FileNames["*", Global$LibDirectory], FileType[#] == Directory &]];


which add all the directories $HOME/Documents/Mathematica/lib/*` into$Path.