Changes between Version 5 and Version 6 of DevelopmentPage/PlanningGame

Timestamp:

May 6, 2010, 4:40:50 PM (14 years ago)

Author:

Olivier Mattelaer

Comment:

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DevelopmentPage/PlanningGame

@@ -16 +16 @@
 || interference terms || ** || T+J || (Connected to non squared amp item) Calculate two amplitudes with the same initial and final state but different couplings/orders and generate a matrix.f that returns the interference. Necessary for NLO. ||
 || color-ordered amplitudes || ** || F+J || Modify the diagram generation to compute the color-ordered amplitudes : keep the cyclic order of the external legs fixed. Feynman rules are without color and slightly different (NB does not need color to be implemented!). This algorithm should scale as 3.8 to the n. Number of diagrams per n gluons amplitudes available in Table 1. of hep-ph/0209271. Implementation idea (JA): Specify combination method in model. ||
-|| test cmdline || * || O || Possibility to test the cmd_interface module ||
 || memory and time profiling and optimization || ** || J+M || Time and memory profiling should be done, to find possible simple improvements. In particular memory might be(come) crucial for generation of e.g. pp > X jjjj and similar multiprocesses with huge numbers of diagrams. ||
 || automatic comparison of matrix elements with MG4 || ** || M || Scripts for running automatic comparison of the matrix elements for a set of processes between MG4 and MG5 ||
@@ -53 +52 @@
 == User stories (discarded/postponed indefinitely) ==
 || initial checks || ** || Setup a list of consistency checks on the process requested that have to be fulfilled in order to have a non-zero results. An example is e+e- > n gluons which now runs very slowly. The logic is check what you can get out of e+e- > a, e g > 0, g g > g, e+ e- g > 0, g g g > g and more up to highest vertex possible in the model. This generates a list of procs with a smaller set of external state. Then one iterates with the results until you end up with a number of legs which is of the same number of verteces in the theory. At this point is easy to check if you have a possibility… Johan, in fact the crucial difference here compared to normal diagram generation is that we don't assign number to external legs. So indeed for multi gluon/photon final states it's a big improvment. But for all other processes it's minor. ||
+|| test cmdline || * || Possibility to test the cmd_interface module. ||