Measurement of the angular distribution of electrons from −→Weν decays observed in p¯p collisions at √s=1.8 TeV
Measurement of the angular distribution of electrons from −→Weν decays observed in p¯p collisions at √s=1.8 TeV
We present the first measurement of the electron angular distribution parameter α2 in −→Weν 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 (1±α1cosθ*+α2cos2θ*), where θ* is the polar angle of the electron in the Collins-Soper frame. In the presence of QCD corrections, the parameters α1 and α2 become functions of pWT, 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.
Abbott, B.
9d06072e-d002-47e9-a49b-d209a2c79e00
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
5 March 2001
Abbott, B.
9d06072e-d002-47e9-a49b-d209a2c79e00
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
DØ collaboration
(2001)
Measurement of the angular distribution of electrons from −→Weν decays observed in p¯p collisions at √s=1.8 TeV.
Physical Review D, 63, [072001].
(doi:10.1103/PhysRevD.63.072001).
Abstract
We present the first measurement of the electron angular distribution parameter α2 in −→Weν 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 (1±α1cosθ*+α2cos2θ*), where θ* is the polar angle of the electron in the Collins-Soper frame. In the presence of QCD corrections, the parameters α1 and α2 become functions of pWT, 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.
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Published date: 5 March 2001
Organisations:
Physics & Astronomy
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Local EPrints ID: 411382
URI: http://eprints.soton.ac.uk/id/eprint/411382
ISSN: 2470-0010
PURE UUID: 0e2a44f4-d79d-4164-8995-97cfdbc00182
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Date deposited: 19 Jun 2017 16:31
Last modified: 16 Mar 2024 03:54
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Author:
B. Abbott
Corporate Author: DØ collaboration
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