Production:CDC;Track_Parameter

 		Element# 		: 		 Equal to the track number.
		TBPUT by 		:		 Smearing routine.
		Contents 		: 		 Smeared Charged track information.
		Format 		: 		 R*4, R*8, I*2, and I*4 mixed.
						 variable length ( 56+number of contributed generator tracks.)

 				 RBUF(1-3)=Í<>px, py, pz.
				 (4)=Í<>E assuming massless particle.
				 (5-7)=Í<>x, y, z of closest approach to the beam axis.
				 IBUF(9)=ápparent charge ( +/-1 )
				 RBUF(11-15)=d$\rho_0$(cm), $\phi_0$(radian), $\kappa$(GeV-1), dZ(cm), and  $\tan\lambda$ of track parameter.
				 (16-18)=Pivot of track parameter, X0, Y0, andZ0.
				 DBUF(10-24)=érror matrix (lower triangle only)
				 RBUF(49)=not used ( reserved for confidence level )
				 (50)=not used ( reserved for $\chi^2$ )
				 HBUF(1,51)=Number of degrees of freedom.
				 (2,51)=not used ( reserved for duplicate flag )
				 (1,52)=Number of track parameters ( 5 for helices )
				 (2,52)=not used ( reserved for track finding type )
				 (1,53)=not used ( reserved for pointer to 1-st hit )
				 (2,53)=not used ( reserved for pointer to last hit )
				 RBUF(54-55)=radius of the innermost and the outmost hit
				 IBUF(56)=Number of contributing generator particle
				 (57)=Particle serial number of first generator particle.
				 		  .........

x, y, z, p_x, p_y, and p_z in RBUF(1-7) are those at the closest approach point to the beam axis regardless of where the track actually started. On the other hand, (X₀, Y₀, Z₀) in RBUF(16-18) is the innermost measured point in the CDC whose radius can be greater than the first wire layer radius for, for instance, a Ks which decayed in the midst of the CDC.