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M.Warchol, J.Warsinsky, M.Watts, G.Wayne, M.Weber, M.Weerts, H.Wegner, M.Wermes, N.White, A.White, VWhiteson, D.Wicke, D.Wijngaarden, D. A.Wilson, G. W.Wimpenny, S. J.Wittlin, J.Wobisch, M.Womersley, J.Wood, D. R.Wyatt, T. R.Xu, Q.Xuan, N.Yamada, R.Yan, M.Yasuda, T.Yatsunenko, Y. A.Yen, Y.Yip, K.Youn, S. W.Yu, J.Yurkewicz, A.Zabi, A.Zatserklyaniy, A.Zdrazil, M.Zeitnitz, C.Zhang, D.Zhang, XZhao, T.Zhao, Z.Zhou, B.Zhu, J.Zielinski, M.Zieminska, D.Zieminski, A.Zitoun, R.Zutshi, VZverev, E. G.Zylberstejn, A.2014-05-202014-05-202005-04-22Physical Review Letters. College Pk: American Physical Soc, v. 94, n. 15, 7 p., 2005.0031-9007http://hdl.handle.net/11449/23279We present a measurement of the W boson pair-production cross section in p(p) over bar collisions at a center-of-mass energy of root s=1.96 TeV. The data, collected with the Run II D0 detector at Fermilab, correspond to an integrated luminosity of 224-252 pb(-1) depending on the final state (ee, e mu, or mu mu). We observe 25 candidates with a background expectation of 8.1 +/- 0.6(stat)+/- 0.6(syst)+/- 0.5(lum) events. The probability for an upward fluctuation of the background to produce the observed signal is 2.3x10(-7), equivalent to 5.2 standard deviations. The measurement yields a cross section of 13.8(-3.8)(+4.3)(stat)(-0.9)(+1.2)(syst)+/- 0.9(lum) pb, in agreement with predictions from the standard model.7engArtigo10.1103/PhysRevLett.94.151801WOS:000228632500010Acesso restritoWOS000228632500010.pdf