Publicação: Measurement of σ(pp̄→Z)·Br(Z→ττ) at √s=1.96 TeV
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We present a measurement of the cross section for Z production times the branching fraction to τ leptons, σ·Br(Z → τ<sup>+</sup>τ<sup>-</sup>), in pp̄ collisions at √s = 1.96 TeV in the channel in which one τ decays into μν<inf>μ</inf>ν <inf>τ</inf>, and the other into hadrons + ν<inf>τ</inf> or eν<inf>e</inf>ν<inf>τ</inf>. The data sample corresponds to an integrated luminosity of 226 pb<sup>-1</sup> collected with the D0 detector at the Fermilab Tevatron collider. The final sample contains 2008 candidate events with an estimated background of 55%. From this we obtain σ·Br(Z → τ<sup>+</sup>τ<sup>-</sup>) = 237 ± 15(stat) ± 18(sys) ± 15(lum)pb, in agreement with the standard model prediction. © 2005 The American Physical Society.
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Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 71, n. 7, p. 1-7, 2005.
