News and Bugs in CalcHEP

 
 1. If  decay products contain top, then  top pole mass is used to  define  open channels. In the previous version 
CalcHEP used 'running' mass.
 
 2.  CalcHEP  had a bug in kinematics  in case of interaction with composite particle (proton)  with zero incomming momentum.  Parton mass was used to pass to the centre  of  mass system. Now  mass of composite particle uses for it. 
 
 3. CalcHEP  had a bug in  translation of qcd-scale function implemented by the user if the function  contained  subtraction "-" operation.
 4. The parameter 'sing'  which distinguishes  proton/antiproton  PDF sometimes initiated with zero. 
After that the user could not assign correct +/-1 value to this parameter.  Corrected. 
 5.  Special treatment of partons with pdg 81,83 intended for d' and c' in is not supported more.
 6.  When paralelization  is  switched off,  we call 'xterm'  which open window for compilation. Sometimes 'xterm' is not installed
      and n_calchep is not compiled. Now we check existence of xterm. 
 7. complex_Quad  is replaced on complex _Quad in include/nType.h
 8. Compiling n_calchep  we don't substitute  compiler flags CFLAGS. Improved.
 9. CalcHEP events file now includes batch file used  for its  generation. This option becomes possible because of improvement of 
 Pythia xml reader.
 10. CalcHEP had a bug in work of "Freeze grid ON/OFF" switch. It did not work after several ON/OFF changes. Fixed
 11. For multi-particle decays sometimes CalcHEP has lost of precision which in its turn leaded to termination of calculation. 
Fixed.