4.6.7 SUBROUTINE ZAUBOS ( BS ) : BOosted Sphericity

This routine calculates the boosted sphericity of the jet in /ZATRS/, /ZAJET/ and /ZAEVT/. ZAUCLU must have been called before, and the number of the jet loaded into IJET of /ZAJET/.

Adopted from a routine by A de Angelis

ARGUMENTS:

OUTPUT :

    BS : Boosted sphericity of the jet.

IMPLICIT INPUTS:

    From /ZAJET/ : IJET, current jet number; PJET, the momentum of the
                   jet.
    From /ZATRS/ : PVEC, seen momentum of tracks; JETNB, jet number
                   of tracks; TRACK, the track number is used locally.
    From /ZAEVT/ : MTRK, the total number of seen tracks.

IMPLICIT OUTPUTS:

    none

CALLED BY :

ZAUSER (see 4.5.10).

CALLED ROUTINE(S):

VMOD,VUNIT,CROSS,VZERO,,VDOT,EISRS2

(CERNLIB routines.)

SIDE EFFECTS:

none

AUTHORS:

A. de Angelis, INFN-Udine & M. Berggren, UFRJ

CREATION DATE:

11-APR-1995