| Re: Evtgen - prob>probmax [message #13581 is a reply to message #13579] |
Thu, 07 June 2012 14:24   |
MartinJGaluska
Messages: 203
Registered: March 2010
Location: Germany
|
first-grade participant |
From: *physik.uni-giessen.de
|
|
I have simulated 10 000 events each of \psi(2S) -> J/\psi \pi^+ \pi^- with PndEvtGenDirect and here are the counts of the "prob > probmax" warnings I get:
mass of psi(2S) & VVPiPi ProbMax & # of "prob > probmax" messages
3.872 GeV & new code & 0
3.872 GeV & old code & 6111
3.68596 GeV & new code & 0
3.68596 GeV & old code & 0
(Sorry, I don't know how to properly format this.)
To sum up:
With the old code (hard-coded value of 0.08 for ProbMax in VVPiPi) I get no warnings for the psi(2S) having its regular mass of 3.68596 GeV. I also do not get any warnings with the code that I have written.
When I change the psi(2S) mass to 3.872 GeV, I get warnings in 6111 out of 10 000 events with the old code. All warnings disappear with the new code.
As an aside: I also tried to just hard-code a higher value for ProbMax (I chose 0.8) and when I ran the simulations, all warnings disappeared as well. However, I am not sure of the effect this value might have on the output of EvtGen. I am still waiting for my email to be answered by the Warwick group.
[Updated on: Thu, 07 June 2012 14:24] Report message to a moderator |
|
|
|
GSI Forum
Search
Help
Members
Login
Home
