Hi Rooters, 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! ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- 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 + +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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