W-boson polarization measurement in the t(t)over-bar dilepton channel using the CDF II detector

被引：3

作者：

Aaltonen, T. ^{[23
,24
]}

Alvarez Gonzalez, B. ^{[10
]}

Amerio, S. ^{[51
]}

Amidei, D. ^{[43
]}

Anastassov, A. ^{[17
]}

Annovi, A. ^{[19
]}

Antos, J. ^{[13
,14
]}

Apollinari, G. ^{[17
]}

Appel, J. A. ^{[17
]}

Arisawa, T. ^{[71
]}

Artikov, A. ^{[15
]}

Asaadi, J. ^{[65
]}

Ashmanskas, W. ^{[17
]}

Auerbach, B. ^{[74
]}

Aurisano, A. ^{[65
]}

Azfar, R. ^{[50
]}

Badgett, W. ^{[17
]}

Bae, T. ^{[28
,29
,30
,31
,33
]}

Barbaro-Galtieri, A. ^{[34
]}

Barnes, V. E. ^{[59
]}

Barnett, B. A. ^{[26
]}

Barria, P. ^{[54
,56
]}

Bartos, P. ^{[13
,14
]}

Bauce, M. ^{[51
,52
]}

Bedeschi, F. ^{[54
]}

Behari, S. ^{[26
]}

Bellettini, G. ^{[54
,55
]}

Bellinger, J. ^{[73
]}

Benjamin, D. ^{[16
]}

Beretvas, A. ^{[17
]}

Bhatti, A. ^{[61
]}

Bisello, D. ^{[51
,52
]}

Bizjak, I. ^{[36
]}

Bland, K. R. ^{[5
]}

Blumenfeld, B. ^{[26
]}

Bocci, A. ^{[16
]}

Bodek, A. ^{[60
]}

Bortoletto, D. ^{[59
]}

Boudreau, J. ^{[58
]}

Boveia, A. ^{[12
]}

Brigliadori, L. ^{[6
,7
]}

Bromberg, C. ^{[44
]}

Brucken, E. ^{[23
,24
]}

Budagov, J. ^{[15
]}

Budd, H. S. ^{[60
]}

Burkett, K. ^{[17
]}

Busetto, G. ^{[51
,52
]}

Bussey, P. ^{[21
]}

Buzatu, A. ^{[39
,40
,41
,42
]}

Calamba, A. ^{[11
]}

机构：

[1] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Univ Athens, GR-15771 Athens, Greece

[4] Univ Autonoma Barcelona, ICREA, Inst Fis Altes Energies, E-08193 Bellaterra, Barcelona, Spain

[5] Baylor Univ, Waco, TX 76798 USA

[6] Ist Nazl Fis Nucl Bologna, Milan, Italy

[7] Univ Bologna, I-40127 Bologna, Italy

[8] Univ Calif Davis, Davis, CA 95616 USA

[9] Univ Calif Los Angeles, Los Angeles, CA 90024 USA

[10] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain

[11] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[12] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[13] Comenius Univ, Bratislava 84248, Slovakia

[14] Inst Expt Phys, Kosice 04001, Slovakia

[15] Joint Inst Nucl Res, RU-141980 Dubna, Russia

[16] Duke Univ, Durham, NC 27708 USA

[17] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[18] Univ Florida, Gainesville, FL 32611 USA

[19] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[20] Univ Geneva, CH-1211 Geneva 4, Switzerland

[21] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

[22] Harvard Univ, Cambridge, MA 02138 USA

[23] Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland

[24] Helsinki Inst Phys, FIN-00014 Helsinki, Finland

[25] Univ Illinois, Urbana, IL 61801 USA

[26] Johns Hopkins Univ, Baltimore, MD 21218 USA

[27] Karlsruhe Inst Technol, Inst Expt Kernphys, D-76131 Karlsruhe, Germany

[28] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea

[29] Seoul Natl Univ, Seoul 151742, South Korea

[30] Sungkyunkwan Univ, Suwon 440746, South Korea

[31] Korea Inst Sci & Technol Informat, Taejon 305806, South Korea

[32] Chonnam Natl Univ, Kwangju 500757, South Korea

[33] Chonbuk Natl Univ, Jeonju 561756, South Korea

[34] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[35] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England

[36] UCL, London WC1E 6BT, England

[37] Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain

[38] MIT, Cambridge, MA 02139 USA

[39] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada

[40] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada

[41] Univ Toronto, Toronto, ON M5S 1A7, Canada

[42] TRIUMF, Vancouver, BC V6T 2A3, Canada

[43] Univ Michigan, Ann Arbor, MI 48109 USA

[44] Michigan State Univ, E Lansing, MI 48824 USA

[45] ITEP, Inst Theoret & Expt Phys, Moscow 117259, Russia

[46] Univ New Mexico, Albuquerque, NM 87131 USA

[47] Ohio State Univ, Columbus, OH 43210 USA

[48] Okayama Univ, Okayama 7008530, Japan

[49] Osaka City Univ, Osaka 588, Japan

[50] Univ Oxford, Oxford OX1 3RH, England

来源：

PHYSICS LETTERS B | 2013年 / 722卷 / 1-3期

基金：

俄罗斯基础研究基金会; 新加坡国家研究基金会; 英国科学技术设施理事会; 芬兰科学院; 美国国家科学基金会; 加拿大自然科学与工程研究理事会; 瑞士国家科学基金会; 澳大利亚研究理事会;

关键词：

D O I：

10.1016/j.physletb.2013.03.032

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a measurement of the W-boson polarization in top-quark decays in t (t) over bar events with decays to dilepton final states using data corresponding to 5.1 fb(-1) of integrated luminosity in p (p) over bar collisions collected by the CDF II detector at the Tevatron. Assuming a top-quark mass of 172.5 GeV/c(2), a simultaneous measurement of the fractions of longitudinal (f(0)) and right-handed (f(+)) W-bosons yields the results f(0) = 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 f(0) = 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. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：48 / 54

页数：7

共 17 条

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