Measurements of Top Pair Production Properties at CDF

As the top quark was discovered in the fairly recent 
Run 1 of the Tevatron, which accumulated only small
numbers of top pair events, the properties of the top 
quark remained to be tested with significant sensitivity.
Now, with the 1 fb$^{-1}$ dataset accumulated in Run 2, much
work has been done to examine this peculiarly massive 
quark, and to look for signs of any deviations from the
Standard Model.  We present the current status of the CDF 
Collaboration's exploration of the top quark sector via
measurements of top production properties.

CDF has studied the $t\bar{t}$ production mechanism by measuring 
the fraction of top pairs produced from quark-antiquark 
annihilation vs gluon-gluon fusion.  We employ the 
correlation between low transverse momentum track 
multiplicity and the presence of softly radiating 
gluons at production as well as correlations between 
the angles of the final top decay products and the 
spin of the top-antitop pair produced in qq vs gg processes. 
We also measure the front-back asymmetry of top pair 
production using event kinematic constraints to 
reconstruct the top production angle.  This asymmetry
could be sensitive to new parity-violating physics such
as seen in theories such as TopColor. The measurements
use $0.3-0.7$ fb$^{-1}$ of CDF data.