TY - JOUR
T1 - W-boson polarization measurement in the tt- dilepton channel using the CDF II detector
AU - CDF Collaboration
AU - Aaltonen, T.
AU - Álvarez González, B.
AU - Amerio, S.
AU - Amidei, D.
AU - Anastassov, A.
AU - Annovi, A.
AU - Antos, J.
AU - Apollinari, G.
AU - Appel, J. A.
AU - Arisawa, T.
AU - Artikov, A.
AU - Asaadi, J.
AU - Ashmanskas, W.
AU - Auerbach, B.
AU - Aurisano, A.
AU - Azfar, F.
AU - Badgett, W.
AU - Bae, T.
AU - Barbaro-Galtieri, A.
AU - Barnes, V. E.
AU - Barnett, B. A.
AU - Barria, P.
AU - Bartos, P.
AU - Bauce, M.
AU - Bedeschi, F.
AU - Behari, S.
AU - Bellettini, G.
AU - Bellinger, J.
AU - Benjamin, D.
AU - Beretvas, A.
AU - Bhatti, A.
AU - Bisello, D.
AU - Bizjak, I.
AU - Bland, K. R.
AU - Blumenfeld, B.
AU - Bocci, A.
AU - Bodek, A.
AU - Bortoletto, D.
AU - Boudreau, J.
AU - Boveia, A.
AU - Brigliadori, L.
AU - Bromberg, C.
AU - Brucken, E.
AU - Budagov, J.
AU - Budd, H. S.
AU - Burkett, K.
AU - Busetto, G.
AU - Bussey, P.
AU - Kimura, N.
AU - Yorita, K.
N1 - Funding Information:
We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation ; the Italian Istituto Nazionale di Fisica Nucleare ; the Ministry of Education, Culture, Sports, Science and Technology of Japan ; the Natural Sciences and Engineering Research Council of Canada ; the National Science Council of the Republic of China ; the Swiss National Science Foundation ; the A.P. Sloan Foundation ; the Bundesministerium für Bildung und Forschung, Germany ; the Korean World Class University Program , the National Research Foundation of Korea ; the Science and Technology Facilities Council and the Royal Society, UK ; the Institut National de Physique Nucleaire et Physique des Particules/CNRS ; the Russian Foundation for Basic Research ; the Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010, Spain ; the Slovak R&D Agency ; the Academy of Finland ; and the Australian Research Council (ARC) .
Publisher Copyright:
© 2013 Elsevier B.V. All rights reserved.
PY - 2013/5/13
Y1 - 2013/5/13
N2 - We present a measurement of the W-boson polarization in top-quark decays in tt- events with decays to dilepton final states using data corresponding to 5.1 fb-1 of integrated luminosity in pp- collisions collected by the CDF II detector at the Tevatron. Assuming a top-quark mass of 172.5 GeV/c2, a simultaneous measurement of the fractions of longitudinal ( f0) and right-handed ( f+) W-bosons yields the results f0 = 0.70-0.17 +0.18 (stat) ± 0.06(syst) and f+ =-0.09 ± 0.09(stat) ± 0.03(syst). Combining this measurement with our previous measurement based on single-lepton final states, we obtain f0 = 0.84 ± 0.09(stat) ± 0.05(syst) and f+ =-0.16 ± 0.05(stat) ± 0.04(syst). The results are consistent with the standard model expectation.
AB - We present a measurement of the W-boson polarization in top-quark decays in tt- events with decays to dilepton final states using data corresponding to 5.1 fb-1 of integrated luminosity in pp- collisions collected by the CDF II detector at the Tevatron. Assuming a top-quark mass of 172.5 GeV/c2, a simultaneous measurement of the fractions of longitudinal ( f0) and right-handed ( f+) W-bosons yields the results f0 = 0.70-0.17 +0.18 (stat) ± 0.06(syst) and f+ =-0.09 ± 0.09(stat) ± 0.03(syst). Combining this measurement with our previous measurement based on single-lepton final states, we obtain f0 = 0.84 ± 0.09(stat) ± 0.05(syst) and f+ =-0.16 ± 0.05(stat) ± 0.04(syst). The results are consistent with the standard model expectation.
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U2 - 10.1016/j.physletb.2013.03.032
DO - 10.1016/j.physletb.2013.03.032
M3 - Article
AN - SCOPUS:84876865961
SN - 0370-2693
VL - 722
SP - 48
EP - 54
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1-3
ER -