Measurement of the angular distribution of electrons from [Formula Presented] decays observed in [Formula Presented] collisions at [Formula Presented] TeV
We present the first measurement of the electron angular distribution parameter [Formula Presented] in [Formula Presented] events produced in proton-antiproton collisions as a function of the W boson transverse momentum. Our analysis is based on data collected using the DØ detector during the 1994–1995 Fermilab Tevatron run. We compare our results with next-to-leading order perturbative QCD, which predicts an angular distribution of [Formula Presented] where [Formula Presented] is the polar angle of the electron in the Collins-Soper frame. In the presence of QCD corrections, the parameters [Formula Presented] and [Formula Presented] become functions of [Formula Presented] the W boson transverse momentum. This measurement provides a test of next-to-leading order QCD corrections which are a non-negligible contribution to the W boson mass measurement. © 2001 The American Physical Society.
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- Nuclear & Particles Physics
- 5107 Particle and high energy physics
- 5101 Astronomical sciences
- 4902 Mathematical physics
- 0206 Quantum Physics
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
- 0201 Astronomical and Space Sciences
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Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Related Subject Headings
- Nuclear & Particles Physics
- 5107 Particle and high energy physics
- 5101 Astronomical sciences
- 4902 Mathematical physics
- 0206 Quantum Physics
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
- 0201 Astronomical and Space Sciences