W-boson polarization measurement in the tt- dilepton channel using the CDF II detector

CDF Collaboration

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)48-54
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume722
Issue number1-3
DOIs
Publication statusPublished - 2013 May 13

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bosons
detectors
polarization
quarks
decay
leptons
luminosity
collisions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

W-boson polarization measurement in the tt- dilepton channel using the CDF II detector. / CDF Collaboration.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 722, No. 1-3, 13.05.2013, p. 48-54.

Research output: Contribution to journalArticle

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title = "W-boson polarization measurement in the tt- dilepton channel using the CDF II detector",
abstract = "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.",
author = "{CDF Collaboration} and T. Aaltonen and {{\'A}lvarez Gonz{\'a}lez}, B. and S. Amerio and D. Amidei and A. Anastassov and A. Annovi and J. Antos and G. Apollinari and Appel, {J. A.} and Tetsuo Arisawa and A. Artikov and J. Asaadi and W. Ashmanskas and B. Auerbach and A. Aurisano and F. Azfar and W. Badgett and T. Bae and A. Barbaro-Galtieri and Barnes, {V. E.} and Barnett, {B. A.} and P. Barria and P. Bartos and M. Bauce and F. Bedeschi and S. Behari and G. Bellettini and J. Bellinger and D. Benjamin and A. Beretvas and A. Bhatti and D. Bisello and I. Bizjak and Bland, {K. R.} and B. Blumenfeld and A. Bocci and A. Bodek and D. Bortoletto and J. Boudreau and A. Boveia and L. Brigliadori and C. Bromberg and E. Brucken and J. Budagov and Budd, {H. S.} and K. Burkett and G. Busetto and P. Bussey and A. Buzatu and Kohei Yorita",
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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, Tetsuo

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 - Buzatu, A.

AU - Yorita, Kohei

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

VL - 722

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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

SN - 0370-2693

IS - 1-3

ER -