Theory Tools for New Physics Searches Mad Graph

Theory Tools for New Physics Searches Mad. Graph and Mad. Event Models Tim Stelzer Data University of Illinois CTEQ May 2007

A Very Good Outline Models • Matrix Element Alpgen Comp. HEP Mad. Event Sherpa • Matching VINCIA MLM CKKW SCET • Showers+Hadronization Pythia HERWIG • Issue + Results Data Sherpa

My Outline Goal Model Data “I don’t have enough time to try all of the event generators. Which ones should I use? J. Proudfoot CTEQ May 2007 Goal: Provide a common infrastructure useful to both theorists and experimentalists for studying high energy physics collisions. User Levels Comprehensive • Model to Data • Flexible User Levels • Comprehensive • Infrastructure 05

Model to Data Goal Model Data Pythia Inclusive Matching User Levels • Interface w/ Pythia (Les. Houches) • Inclusive Samples (W+Jets) • MLM Matching (Johan Alwall) Comprehensive Infrastructure 8

User Levels Goal Model Data Pythia Inclusive Matching User Levels Web Local Addict Comprehensive • Web-User – Generate process and events on web. Download events for further analysis • Local User – Download source for process, modify and run on local machines. • Addict Infrastructure – Set up entire system for local process and event generation 10

User Levels Goal Model Data Pythia Inclusive Matching User Levels Web Local Addict Comprehensive hep-ph/0611129 Alwall+de Visscher w/ Mad. Event Infrastructure 14

Comprehensive Goal Model Data Pythia Inclusive Matching User Levels Web Local Addict Comprehensive SM MSSM HEFT User Mod Mad. Rules • Signals and Backgrounds calculated with same tool for multiple analysis. • Reduces overhead • Reduces errors • Each Analysis needs Multiple Checks Infrastructure 16

Comprehensive Goal Model Data Pythia Inclusive Matching • Standard Model User Levels Web Local Addict Comprehensive *SM* MSSM HEFT User Mod Mad. Rules Infrastructure 17

Comprehensive Goal Model Data Pythia Inclusive Matching User Levels Web Local Addict Comprehensive SM *HEFT* MSSM User Mod Mad. Rules • Higgs Effective Field Theory – Fabio Maltoni, Rikkert Frederix – Effective gg. H vertex from top quark loop • Two Higgs Doublet Model (2 HDM) – Hichel Herquet and Simon de Visscher Infrastructure 19

Comprehensive Goal Model Data Pythia Inclusive Matching • MSSM (Hagiwara et al. 2005) – David Rainwater, Tilman Plehn, Johan Alwall User Levels Web Local Addict Comprehensive SM HEFT *MSSM* User Mod Mad. Rules Infrastructure ~500 processes to check all Feynman rules (CP and R-conserving, CKM=MSN=1)

Comprehensive Goal Model Data Pythia Inclusive Matching User Levels Web Local Addict Comprehensive SM HEFT MSSM *User Mod* *Mad. Rules* Infrastructure • User Defined Models – Particles. dat – Interactions. dat – Couplings • User. Mod – scripts for adding particles/interactions. • Mad. Rules – Mathmatica: Lagrangian-> Mad. Event 21

Comprehensive Goal Model Data Pythia Inclusive Matching User Levels Web Local Addict Comprehensive SM HEFT MSSM *User Mod* *Mad. Rules* Infrastructure • User Defined Models – Particles. dat – Interactions. dat – Couplings • User. Mod (Simon de Visscher) – scripts for adding particles/interactions. • Mad. Rules (Claude Duhr) – Mathmatica: Lagrangian-> Mad. Event 21

Infrastructure Goal Model Data Pythia Inclusive Matching User Levels Web Local Addict Comprehensive SM MSSM HEFT User Mod Mad. Rules Infrastructure • Hardware – UIUC – CP 3 – Rome 40 node farm 4 TB 32 node farm • People – Over 1000 registered users – Great Collaborators – Proposal increased user support 23

Summary Goal Model Data Pythia Inclusive Matching User Levels Web Local Addict Comprehensive SM MSSM HEFT User Mod Mad. Rules Infrastructure Provide a common infrastructure useful to both theorists and experimentalists for studying high energy physics collisions. • Model to Data • Flexible User Levels • Comprehensive • Infrastructure • What would you find most helpful? 25