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Sphericity

\fbox {CALL QJSPHE (SPHERI, \lq spheri$-$axis', ICLASS)}

Calculates sphericity value and sphericity axis. See also QJEIG in 10.4 for eigenvalues and eigenvectors of the momentum tensor. Input argument:

ICLASS
described in 10.3.

Results:

SPHERI
Sphericity value
'spheri-axis'
Sphericity axis.

Error conditions:

Zero or one track
SPHERI value 0.; output vector = 0.,0.,0.,0.
Two tracks
SPHERI = 0.; output vector = track vector with largest p.

Joel Closier
2000-02-07