Measurement of the polarisation of W bosons produced in top-quark decays using dilepton events at √s=13 TeV with the ATLAS experiment
A measurement of the polarisation of W bosons produced in top-quark decays is presented, using proton-proton collision data at a centre-of-mass energy of √s=13 TeV. The data were collected by the ATLAS detector at the Large Hadron Collider and correspond to an integrated luminosity of 139 fb−1. The...
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
10 August 2023
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| In: |
Physics letters
Year: 2023, Jahrgang: 843, Pages: 1-22 |
| ISSN: | 1873-2445 |
| DOI: | 10.1016/j.physletb.2023.137829 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1016/j.physletb.2023.137829 Verlag, kostenfrei, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269323001636 
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| Verfasserangaben: | The ATLAS Collaboration |
MARC
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| 245 | 1 | 0 | |a Measurement of the polarisation of W bosons produced in top-quark decays using dilepton events at √s=13 TeV with the ATLAS experiment |c The ATLAS Collaboration |
| 246 | 3 | 0 | |a sqrt |
| 246 | 3 | 3 | |a Measurement of the polarisation of W bosons produced in top-quark decays using dilepton events at square root s =13 TeV with the ATLAS experiment |
| 264 | 1 | |c 10 August 2023 | |
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| 300 | |a 22 | ||
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| 500 | |a Im Titel steht der Buchstabe s unter dem Wurzelsymbol | ||
| 500 | |a The ATLAS Collaboration: G. Aad, L.M. Baltes, F. Bartels, F.L. Castillo, M.M. Czurylo, F. Del Rio, S.J. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, M. Klassen, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, S. Rodriguez Bosca, A. Schoening, H-C. Schultz-Coulon, V. Sothilingam, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, J. Zinsser [und viele weitere] | ||
| 500 | |a Gesehen am 03.06.2024 | ||
| 520 | |a A measurement of the polarisation of W bosons produced in top-quark decays is presented, using proton-proton collision data at a centre-of-mass energy of √s=13 TeV. The data were collected by the ATLAS detector at the Large Hadron Collider and correspond to an integrated luminosity of 139 fb−1. The measurement is performed selecting tt¯ events decaying into final states with two charged leptons (electrons or muons) and at least two b-tagged jets. The polarisation is extracted from the differential cross-section distribution of the cosθ⁎ variable, where θ⁎ is the angle between the momentum direction of the charged lepton from the W boson decay and the reversed momentum direction of the b-quark from the top-quark decay, both calculated in the W boson rest frame. Parton-level results, corrected for the detector acceptance and resolution, are presented for the cosθ⁎ angle. The measured fractions of longitudinal, left- and right-handed polarisation states are found to be f0=0.684±0.005(stat.)±0.014(syst.), fL=0.318±0.003(stat.)±0.008(syst.) and fR=−0.002±0.002(stat.)±0.014(syst.), in agreement with the Standard Model prediction. | ||
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