Observation of the associated production of a top quark and a Z boson in pp collisions at √s=13 TeV with the ATLAS detector
Single top-quark production in association with a Z boson, where the Z boson decays to a pair of charged leptons, is measured in the trilepton channel. The proton-proton collision data collected by the ATLAS experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV are used, corresponding to...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
July 20, 2020
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| In: |
Journal of high energy physics
Year: 2020, Issue: 7 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP07(2020)124 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP07(2020)124
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| Author Notes: | The ATLAS collaboration |
MARC
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| 245 | 1 | 0 | |a Observation of the associated production of a top quark and a Z boson in pp collisions at √s=13 TeV with the ATLAS detector |c The ATLAS collaboration |
| 246 | 3 | 0 | |a sqrt |
| 246 | 3 | 3 | |a Observation of the associated production of a top quark and a Z boson in pp collisions at square root s = 13 TeV with the ATLAS detector |
| 264 | 1 | |c July 20, 2020 | |
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| 500 | |a ATLAS Collaboration: G. Aad, C. Anders, G.V. Andrei, A. Bolz, M. Dunford, D.E. Ferreira de Lima, S. Franchino, L. Helary, J. Jongmanns, M. Klassen, M. Kolb, A. Krishnan, A. Kugel, M. Lisovyi, T. Mkrtchyan, F. Napolitano, P. Ott, M. Sahinsoy, A. Schoening, H.-C. Schultz-Coulon, T. Spieker, R. Stamen, P. Starovoitov, S. Suchek, L. Vigani, S. Weber, M. Wessels, X. Yue [und 2894 weitere] | ||
| 500 | |a Im Titel steht der Buchstabe s unter dem Wurzelsymbol | ||
| 500 | |a Gesehen am 05.11.2020 | ||
| 520 | |a Single top-quark production in association with a Z boson, where the Z boson decays to a pair of charged leptons, is measured in the trilepton channel. The proton-proton collision data collected by the ATLAS experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 139 fb−1. Events containing three isolated charged leptons (electrons or muons) and two or three jets, one of which is identified as containing a b-hadron, are selected. The main backgrounds are from tt¯Z and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for tℓ+ℓ−q production, including non-resonant dilepton pairs with mℓ+ℓ− > 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction. | ||
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