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

CDF Collaboration

doi:10.1016/j.physletb.2013.03.032

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

CDF Collaboration

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

8 引文斯高帕斯（Scopus）

摘要

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.

原文	???core.languages.en_GB???
頁（從 - 到）	48-54
頁數	7
期刊	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
卷	722
發行號	1-3
DOIs	https://doi.org/10.1016/j.physletb.2013.03.032
出版狀態	已出版 - 13 5月 2013

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10.1016/j.physletb.2013.03.032

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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 T. 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 Yu, {S. S.}",

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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, 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 - Buzatu, A.

AU - Yu, S. S.

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.

UR - http://www.scopus.com/inward/record.url?scp=84876865961&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2013.03.032

DO - 10.1016/j.physletb.2013.03.032

M3 - 期刊論文

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 -

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

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