The transverse momentum cross section of e+e- pairs in the
Z-boson mass region of 66–116 GeV/c2 is precisely measured using
Run II data corresponding to 2.1 fb-1 of integrated luminosity
recorded by the Collider Detector at Fermilab. The cross section
is compared with two quantum chromodynamic calculations. One is a
fixed-order perturbative calculation at O(αs2), and the other combines
perturbative predictions at high transverse momentum with the gluon
resummation formalism at low transverse momentum. Comparisons of the
measurement with calculations show reasonable agreement. The measurement
is of sufficient precision to allow refinements in the understanding of
the transverse momentum distribution.
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Updated: Thursday, 2012 October 18 11:26:15 CDT automatically from input from Stephanie A Schuler