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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: Aad, Georges (VerfasserIn) , Anders, Christoph (VerfasserIn) , Anders, Gabriel (VerfasserIn) , Andrei, George Victor (VerfasserIn) , Davygora, Yuriy (VerfasserIn) , Dietzsch, Thorsten (VerfasserIn) , Geweniger, Christoph (VerfasserIn) , Hanke, Paul (VerfasserIn) , Henke, Michael (VerfasserIn) , Kasieczka, Gregor (VerfasserIn) , Khomich, Andrei (VerfasserIn) , Kluge, Eike-Erik (VerfasserIn) , Kugel, Andreas (VerfasserIn) , Lendermann, Victor (VerfasserIn) , Lepold, Florian (VerfasserIn) , Männer, Reinhard (VerfasserIn) , Meier, Karlheinz (VerfasserIn) , Müller, Felix (VerfasserIn) , Narayan, Rohin T. (VerfasserIn) , Poddar, Sahill (VerfasserIn) , Schätzel, Sebastian (VerfasserIn) , Scharf, Veit (VerfasserIn) , Schöning, André (VerfasserIn) , Schmitt, Sebastian (VerfasserIn) , Schroer, Nicolai (VerfasserIn) , Schultz-Coulon, Hans-Christian (VerfasserIn) , Stamen, Rainer (VerfasserIn) , Wessels, Martin (VerfasserIn)
Körperschaft: ATLAS Collaboration (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: June 15, 2012
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
Volltext
Verfasserangaben:the ATLAS Collaboration
Beschreibung
Zusammenfassung: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.
Beschreibung: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]
Gesehen am 28.11.2018
Beschreibung:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP06(2012)088

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