Changes between Initial Version and Version 1 of HelpSyntax

Timestamp:

May 17, 2010, 3:37:07 PM (15 years ago)

Author:

Olivier Mattelaer

Comment:

HelpSyntax

@@ +1 @@
+== !MadGraph5 Syntax For generate events ==
+
+Compare to MG4 the syntax is basically the same
+but 
+{{{
+   1. All particles should be separated with a spaces
+
+      write this:
+         w+ > ve e+
+      and not:
+         w+>vee+
+
+   2. The coupling is specify after the process in the same line
+      Please note that::
+        a. Note that contrary to !MG4 the default for the coupling is to infinity
+        b. couplings are case sensitive
+
+      write this:
+         w+ > ve e+ QED=2
+      and not:
+         w+>ve e+ qed=2
+
+   3. you can still use the special tag at the end of the process
+      a. "/" fordids the following particles to appear in the process
+      b. "$"  fordids the following particles to appear in a S-Channel
+
+   4. The syntax for decay chain is different.
+      a. In !MG5 the production process is separated from the decay by a coma. 
+      b. Each part can be restricted by couplings/ special tag restrictions
+
+      write this:
+         g g > t t~ QED=0 /a, (t > b W+, W+ > l+ vl), t~ >j j j QCD=0
+      and not:
+         g g > (t >b (W+ >l+vl))(t~> j j j)      
+}}}