Measurement of the polar-angle distribution of leptons from W boson decay as a function of the W transverse momentum in pp¯ collisions at s=1.8TeV

D. Acosta et al. (CDF Collaboration)
Phys. Rev. D 70, 032004 – Published 19 August 2004
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Abstract

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 80±4pb1 sample of pp¯ collisions at s=1.8TeV collected by the CDF detector and includes data from both the We+ν and Wμ+ν 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 10GeV/c.

  • Received 24 November 2003

DOI:https://doi.org/10.1103/PhysRevD.70.032004

©2004 American Physical Society

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Vol. 70, Iss. 3 — 1 August 2004

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