Measurement of the WZ -> lvll cross section and limits on anomalous triple gauge couplings in p(p)over-bar collisions at root s=1.96 TeV

Nenhuma Miniatura disponível

Data

2011-01-10

Autores

Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
Alexeev, G. D.
Alkhazov, G.
Alton, A.
Alverson, G.

Título da Revista

ISSN da Revista

Título de Volume

Editor

Elsevier B.V.

Resumo

We present a new measurement of the WZ -> lvll (l = e, mu) cross section and limits on anomalous triple gauge couplings. Using 4.1 fb(-1) of integrated luminosity of p (p) over bar collisions at root s = 1.96 TeV, 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 3.89(-0.90)(+1.07) pb, 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 < lambda(z) < 0.093 and -0.029 < Delta kappa(z) < 0.080 in the HISZ parameterization for a Lambda = 2 TeV form factor scale. These are the best limits to date obtained from the direct measurement of the WWZ vertex. (C) 2010 Elsevier B.V. All rights reserved.

Descrição

Palavras-chave

Diboson production, W and Z bosons, Cross section, Anomalous triple gauge couplings, Tevatron, DO

Como citar

Physics Letters B. Amsterdam: Elsevier B.V., v. 695, n. 1-4, p. 67-73, 2011.