4.7.4 SUBROUTINE PXTCPX(RADIUS, PAR, P, X) : transform Track parameters on Cylinder to PXpypz

This routine transforms the TKR parameters given in PAR, at RADIUS to particle 3 momentum and the cartesian coordinates of the point where PAR was given.

ARGUMENTS:

INPUT :

    RADIUS : radius where track parameters are given. If RADIUS = 0,
             the parameters are assumed to be at the perigee.
    PAR : Track parameters.

OUTPUT :

    P : 3-momentum of the track.
    X : Cartesian coordinates of the point where PAR was given.

IMPLICIT INPUTS:

    From /PXCONS/ : BMAG, magnetic field; CONSA, speed of light.

IMPLICIT OUTPUTS:

    none.

CALLED BY :

any routine.

CALLED ROUTINE(S):

ZUI2PI (see 4.7.2)

(To bring an angle In the range 0 to 2PI.)

SIDE EFFECTS:

none.

AUTHORS:

M. Berggren, UFRJ

CREATION DATE:

12-APR-1995