Changes between Version 1 and Version 2 of FAQ-General-10


Ignore:
Timestamp:
Apr 6, 2012, 4:33:02 PM (13 years ago)
Author:
trac
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • FAQ-General-10

    v1 v2  
    11
    22
    3 ==== I generated an s-channel process p p > W+ > e+ ve, and in some events the W doesn't show up in the event record. Why is this? ====
     3==== I generated an s-channel process p p > W+ > e+ ve, and in some events the W doesn't show up in the event record. Why is this? ====
    44
    55This is perfectly normal. Since you haven't used the decay chain syntax for the W,
    66
    7 p p > (W+ > e+ ve) (in MG4) or
     7p p > (W+ > e+ ve) (in MG4) or
    88
    9 p p > W+, W+ > e+ ve (in MG5)
     9p p > W+, W+ > e+ ve (in MG5)
    1010
    1111the W is not forced to be onshell - so when the invariant mass of e+ ve goes beyond the specified 15 widths (given by bwcutoff in the run_card) it is not included in the event file.
     
    1414
    1515-- Main.JohanAlwall - 2011-01-29
     16