Measurement of the W boson polarization in top quark decays with the ATLAS detector
This paper presents measurements of the polarization of W bosons in top quark decays, derived from tt¯tt¯ t\overline t events with missing transverse momentum, one charged lepton and at least four jets, or two charged leptons and at least two jets. Data from pp collisions at a centre-of-mass energy...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
June 15, 2012
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| In: |
Journal of high energy physics
Year: 2012, Heft: 6 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP06(2012)088 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1007/JHEP06(2012)088 Verlag, Volltext: https://doi.org/10.1007/JHEP06(2012)088 |
| Verfasserangaben: | the ATLAS Collaboration |
MARC
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| 245 | 1 | 0 | |a Measurement of the W boson polarization in top quark decays with the ATLAS detector |c the ATLAS Collaboration |
| 264 | 1 | |c June 15, 2012 | |
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| 500 | |a The ATLAS Collaboration: G. Aad, C.F. Anders, G. Anders, V. Andrei, Y. Davygora, T.A. Dietzsch, C. Geweniger, P. Hanke, M. Henke, G. Kasieczka, A. Khomich, E.-E. Kluge, A. Kugel, V. Lendermann, F. Lepold, R. Maenner, K. Meier, F. Müller, R. Narayan, S. Poddar, S. Schaetzel, V. Scharf, A. Schöning, S. Schmitt, N. Schroer, H.-C. Schultz-Coulon, R. Stamen, M. Wessels [und weitere] | ||
| 500 | |a Gesehen am 28.11.2018 | ||
| 520 | |a This paper presents measurements of the polarization of W bosons in top quark decays, derived from tt¯tt¯ t\overline t events with missing transverse momentum, one charged lepton and at least four jets, or two charged leptons and at least two jets. Data from pp collisions at a centre-of-mass energy of 7 TeV were collected with the ATLAS experiment at the LHC and correspond to an integrated luminosity of 1.04 fb−1. The measured fractions of longitudinally, left- and right-handed polarization are F 0 = 0.67 ± 0.07, F L = 0.32 ± 0.04 and F R = 0.01 ± 0.05, in agreement with the Standard Model predictions. As the polarization of the W bosons in top quark decays is sensitive to the Wtb vertex Lorentz structure and couplings, the measurements were used to set limits on anomalous contributions to the Wtb couplings. | ||
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