| | 1 | |
| | 2 | |
| | 3 | == Decay Chains == |
| | 4 | |
| | 5 | |
| | 6 | |
| | 7 | === People === |
| | 8 | 1. Johan Alwall |
| | 9 | 1. Tim Stelzer |
| | 10 | |
| | 11 | === Aim of the project === |
| | 12 | Allow MadGraph to specify decay chains of the type pp>(t>(W+>e+ve)b)(t~>(W->jj)b~). |
| | 13 | |
| | 14 | === Tools === |
| | 15 | * MadGraph |
| | 16 | |
| | 17 | === Work === |
| | 18 | * MadGraph: |
| | 19 | * Implementation of pruning of topologies to speed up process generation for many final state particles |
| | 20 | * Example: pp>(t>(w+>jj)b)(t~>(w->l-vl~)b~): 16 min 15 s with decay chains, 2 h 33 min without decay chains |
| | 21 | * Allow only specified decay chains. Give information on which resonances must be on-shell to MadEvent |
| | 22 | * Allow more than 9 external particles |
| | 23 | * MadEvent: |
| | 24 | * Read on-shell resonance information to generate only correct diagrams |
| | 25 | * Allow more than 9 external particles |
| | 26 | |
| | 27 | The implementation in MadGraph and MadEvent is completed, but needs to be tested with "real" physics. Still to do is: |
| | 28 | * Diagram drawing for more than 9 external particles |
| | 29 | * Allowing more than 10 external particles in MadGraph |
| | 30 | |
| | 31 | ==== Physics results and papers writeup ==== |
| | 32 | To be decided |
| | 33 | |
| | 34 | -- Main.JohanAlwall - 31 Aug 2007 |
