TY  - JOUR
Y1  - 2004/08/01/
SN  - 1550-7998
N2  - We present a measurement of the polar-angle distribution of leptons from W boson decay, as a function of the W transverse momentum. The measurement uses an 80ą4 pb-1 sample of pp? collisions at sqrt[s]=1.8 TeV collected by the CDF detector and includes data from both the W?e+? and W??+? decay channels. We fit the W boson transverse mass distribution to a set of templates from a Monte Carlo event generator and detector simulation in several ranges of the W transverse momentum. The measurement agrees with the standard model expectation, whereby the ratio of longitudinally to transversely polarized W bosons, in the Collins-Soper W rest frame, increases with the W transverse momentum at a rate of approximately 15% per 10 GeV/c.
AV  - public
JF  - Physical Review D
UR  - http://dx.doi.org/10.1103/PhysRevD.70.032004
N1  - The CDF Collaboration includes the following UCL authors: M. Lancaster, R. Snihur, and D. Waters
VL  - 70
ID  - discovery9704
TI  - Measurement of the polar-angle distribution of leptons from W boson decay as a function of the W transverse momentum in pp[over Ż] collisions at sqrt[s]=1.8 TeV
A1  - CDF Collaboration, The
IS  - 3
ER  -