Measurement of the $W \to τ ν$ Production Cross Section in $p \bar{p}$ Collisions at $\sqrt{s} = 1.8 TeV$

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19 June 2000

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 84 (25) , 5710-5715
https://doi.org/10.1103/physrevlett.84.5710

Abstract

We report on a measurement of

σ (p \bar{p} \to W + X) B (W \to τ ν)

in

p \bar{p}

collisions at

\sqrt{s} = 1.8 TeV

at the Fermilab Tevatron. The measurement is based on an integrated luminosity (lum) of

18 {pb}^{- 1}

of data collected with the D0 detector during 1994–1995. We find that

σ (p \bar{p} \to W + X) B (W \to τ ν) = 2.22 \pm 0.09 (stat) \pm 0.10 (syst) \pm 0.10 (lum) nb

. Lepton universality predicts that the ratio of the tau and electron electroweak charged current couplings to the

W

boson,

g_{τ}^{W} {/ g}_{e}^{W}

, be unity. We find

g_{τ}^{W} {/ g}_{e}^{W} = 0.980 \pm 0.031

, in agreement with lepton universality.

Keywords

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This publication has 10 references indexed in Scilit:

Extraction of the width of the W boson from measurements of $σ (p \bar{p} \to W + X) \times B (\vec{W} e ν)$ and $σ (p \bar{p} \to Z + X) \times B (\vec{Z} e e)$ and their ratio
Physical Review D, 2000
W pair production cross-section and W branching fractions in e+e− interactions at 183 GeV
Physics Letters B, 1999
Measurement of W-pair production in e+e− collisions at 183 GeV
Physics Letters B, 1999
$\mathrm{W^+W^-}$
The European Physical Journal C, 1999
Measurement of W-pair cross sections in e+e− interactions at s=183GeV and W-decay branching fractions
Physics Letters B, 1998
The DØ detector
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1994
Measurement of the ratioB(W→τν)/B(W→eν) inpp¯collisions at √s=1.8 TeV
Physical Review Letters, 1992
A search for charged Higgs from top quark decay at the CERN p̄p collider
Physics Letters B, 1992
Measurement of the ratio R≡σWBr(W→μν)/σzBr(Z→μμ) and ΓWtot at the CERN proton-antiproton collider
Physics Letters B, 1991
Studies of intermediate vector boson production and decay in UA1 at the CERN proton-antiproton collider
The European Physical Journal C, 1989