I've got a problem in intializing Pythia:
======== source code ===========
TROOT PythRoot("PythRoot","running pythia");
int main(){
//inits
int NofEvents = 100;
TPythia pythia;
TObjArray* particlelist;
TFile ofile("pythia.root","RECREATE");
pythia.SetMSEL(1);
pythia.SetPMAS(6,1,175.0);
pythia.Initialize("FIXT","p","p",820.);
(...)
}
=================================
The ouput produced is:
******************************************************************************
******************************************************************************
** **
** **
** *......* Welcome to the Lund Monte Carlo! **
** *:::!!:::::::::::* **
** *::::::!!::::::::::::::* PPP Y Y TTTTT H H III A **
** *::::::::!!::::::::::::::::* P P Y Y T H H I A A **
** *:::::::::!!:::::::::::::::::* PPP Y T HHHHH I AAAAA **
** *:::::::::!!:::::::::::::::::* P Y T H H I A A **
** *::::::::!!::::::::::::::::*! P Y T H H III A A **
** *::::::!!::::::::::::::* !! **
** !! *:::!!:::::::::::* !! This is PYTHIA version 6.115 **
** !! !* -><- * !! Last date of change: 27 Jan 1998 **
** !! !! !! **
** !! !! !! **
** !! !! **
** !! ep !! Disclaimer: this program comes **
** !! !! without any guarantees. Beware **
** !! pp !! of errors and use common sense **
** !! e+e- !! when interpreting results. **
** !! !! **
** !! Copyright T. Sjostrand (1997) **
** **
** An archive of program versions and documentation is found on the web: **
** http://www.thep.lu.se/tf2/staff/torbjorn/Pythia.html **
** **
** When you cite this program, currently the official reference is **
** T. Sjostrand, Computer Physics Commun. 82 (1994) 74. **
** The supersymmetry extensions are described in **
** S. Mrenna, Computer Physics Commun. 101 (1997) 232 **
** Also remember that the program, to a large extent, represents original **
** physics research. Other publications of special relevance to your **
** studies may therefore deserve separate mention. **
** **
** Main author: Torbjorn Sjostrand; Department of Theoretical Physics 2, **
** Lund University, Solvegatan 14A, S-223 62 Lund, Sweden; **
** phone: + 46 - 46 - 222 48 16; e-mail: torbjorn@thep.lu.se **
** SUSY author: Stephen Mrenna, Argonne National Laboratory, **
** 9700 South Cass Avenue, Argonne, IL 60439, USA; **
** phone: + 1 - 630 - 252 - 7615; e-mail: mrenna@hep.anl.gov **
** **
** **
******************************************************************************
******************************************************************************
1****************** PYINIT: initialization of PYTHIA routines *****************
==============================================================================
I I
I PYTHIA will be initialized for p on p fixed target I
I at -1.997 GeV/c lab-momentum I
I I
I corresponding to 2.429 GeV center-of-mass energy I
I I
==============================================================================
Error: too low CM energy, 2.429 GeV for event generation.
Execution stopped!
-------------------------------------------------------------------------------
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I compared with the AtlFast-docu on the root-HP, but didn't find the
difference up to the initialize-call...
So: what's going wrong?
I'm running root, version 2.20/06 on LINUX.
Any help is welcome...
Thanks, Robert
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Robert Loke +
+ Humboldt University Berlin +
+ Invalidenstr. 110 +
+ 10115 Berlin +
+ Germany +
+ +
+ e-mail : loke@ifh.de +
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++