FastJet 3.0.2
numconsts.hh
00001 //STARTHEADER
00002 // $Id: numconsts.hh 2577 2011-09-13 15:11:38Z salam $
00003 //
00004 // Copyright (c) 2005-2011, Matteo Cacciari, Gavin P. Salam and Gregory Soyez
00005 //
00006 //----------------------------------------------------------------------
00007 // This file is part of FastJet.
00008 //
00009 //  FastJet is free software; you can redistribute it and/or modify
00010 //  it under the terms of the GNU General Public License as published by
00011 //  the Free Software Foundation; either version 2 of the License, or
00012 //  (at your option) any later version.
00013 //
00014 //  The algorithms that underlie FastJet have required considerable
00015 //  development and are described in hep-ph/0512210. If you use
00016 //  FastJet as part of work towards a scientific publication, please
00017 //  include a citation to the FastJet paper.
00018 //
00019 //  FastJet is distributed in the hope that it will be useful,
00020 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
00021 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00022 //  GNU General Public License for more details.
00023 //
00024 //  You should have received a copy of the GNU General Public License
00025 //  along with FastJet. If not, see <http://www.gnu.org/licenses/>.
00026 //----------------------------------------------------------------------
00027 //ENDHEADER
00028 
00029 
00030 
00031 #ifndef __FASTJET_NUMCONSTS__
00032 #define __FASTJET_NUMCONSTS__
00033 
00034 #include "fastjet/internal/base.hh"
00035 
00036 FASTJET_BEGIN_NAMESPACE      // defined in fastjet/internal/base.hh
00037 
00038 // some common useful constants!
00039 
00040 const double pi = 3.141592653589793238462643383279502884197;
00041 const double twopi = 6.283185307179586476925286766559005768394;
00042 const double pisq  = 9.869604401089358618834490999876151135314;
00043 const double zeta2 = 1.644934066848226436472415166646025189219;
00044 const double zeta3 = 1.202056903159594285399738161511449990765;
00045 const double eulergamma = 0.577215664901532860606512090082402431042;
00046 const double ln2   = 0.693147180559945309417232121458176568076;
00047 
00048 
00049 FASTJET_END_NAMESPACE
00050 
00051 #endif // __FASTJET_NUMCONSTS__
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