real Ebeam,Mtarg,Mmeson
      common /xsect1/Ebeam,Mtarg,Mmeson

      double precision Emeson,Pmeson
      common /xsect2/Emeson,Pmeson

      real betaFF
      parameter (betaFF=0.71) ! GeV

      real GGwidthpi0,GGwidtheta
      parameter (GGwidthpi0=7.7e-9) ! GeV - value for the pion
      parameter (GGwidtheta=5.1e-7) ! GeV - value for the eta
      real GGwidth
      common /xsect3/GGwidth

      real Ztarg
      parameter (Ztarg=1)

      real alphaQED,hbarc
      parameter (alphaQED=7.297e-3)
      parameter (hbarc=0.197) ! GeV.fm