Measurement of the WZ→ℓνℓℓ cross section and limits on anomalous triple gauge couplings in collisions at

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• 作者：D0 Collaboration ; V.M. Abazov ; B. Abbott ; M. Abolins ; B.S. Acharya ; M. Adams ; T. Adams ; G.D. Alexeev ; G. Alkhazov ; A. Alton ; G. Alverson ; G.A. Alves ; L.S. Ancu ; M. Aoki ; Y. Arnoud ; M. Arov ; A. Askew
• 关键词：Diboson production ; W and Z bosons ; Cross section ; Anomalous triple gauge couplings ; Tevatron ; D0
• 刊名：Physics Letters B
• 出版年：2011
• 出版时间：10 January 2011
• 年：2011
• 卷：695
• 期：1-4
• 页码：67-73
• 全文大小：605 K

文摘

We present a new measurement of the WZ→ℓνℓℓ (ℓ=e,μ) cross section and limits on anomalous triple gauge couplings. Using 4.1 fb⁻¹ of integrated luminosity of collisions at , we observe 34 WZ candidate events with an estimated background of 6.0±0.4 events. We measure the WZ production cross section to be , in good agreement with the standard model prediction. We find no evidence for anomalous WWZ couplings and set 95 % C.L. limits on the coupling parameters, −0.077<λ_Z<0.093 and −0.029<Δκ_Z<0.080 in the HISZ parameterization for a Λ=2 TeV form factor scale. These are the best limits to date obtained from the direct measurement of the WWZ vertex.