Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/18223
Title: Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at √s=13 TeV
Authors: Sirunyan, AM
Tumasyan, A
Adam, W
Ambrogi, F
Asilar, E
Bergauer, T
Brandstetter, J
Brondolin, E
Dragicevic, M
Erö, J
Escalante Del Valle, A
Flechl, M
Friedl, M
Frühwirth, R
Ghete, VM
Grossmann, J
Hrubec, J
Jeitler, M
König, A
Krammer, N
Krätschmer, I
Liko, D
Madlener, T
Mikulec, I
Pree, E
Rad, N
Rohringer, H
Schieck, J
Schöfbeck, R
Spanring, M
Spitzbart, D
Waltenberger, W
Wittmann, J
Wulz, CE
Zarucki, M
Chekhovsky, V
Mossolov, V
Suarez Gonzalez, J
De Wolf, EA
Di Croce, D
Janssen, X
Lauwers, J
Van De Klundert, M
Van Haevermaet, H
Van Mechelen, P
Van Remortel, N
Abu Zeid, S
Blekman, F
D Hondt, J
De Bruyn, I
De Clercq, J
Deroover, K
Flouris, G
Lontkovskyi, D
Lowette, S
Marchesini, I
Moortgat, S
Moreels, L
Python, Q
Skovpen, K
Tavernier, S
Van Doninck, W
Van Mulders, P
Van Parijs, I
Beghin, D
Bilin, B
Brun, H
Clerbaux, B
De Lentdecker, G
Delannoy, H
Dorney, B
Fasanella, G
Favart, L
Goldouzian, R
Grebenyuk, A
Kalsi, AK
Lenzi, T
Luetic, J
Maerschalk, T
Marinov, A
Seva, T
Starling, E
Vander Velde, C
Vanlaer, P
Vannerom, D
Yonamine, R
Zenoni, F
Cornelis, T
Dobur, D
Fagot, A
Gul, M
Khvastunov, I
Poyraz, D
Roskas, C
Salva, S
Tytgat, M
Verbeke, W
Zaganidis, N
Bakhshiansohi, H
Bondu, O
Keywords: Hadron-Hadron scattering (experiments),;Top physics
Issue Date: 3-Aug-2018
Publisher: Springer
Citation: Journal of High Energy Physics, 2018, 2018 (8)
Abstract: A measurement is performed of the cross section of top quark pair production in association with a W or Z boson using proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb −1 , collected by the CMS experiment in 2016. The measurement is performed in the same-sign dilepton, three- and four-lepton final states. The production cross sections are measured to be σ(tt¯W)=0.77−0.11+0.12(stat)−0.12+0.13(syst)pb and σ(tt¯Z)=0.99−0.08+0.09(stat)−0.10+0.12(syst)pb. The expected (observed) signal significance for the t t ¯ W production in same-sign dilepton channel is found to be 4.5 (5.3) standard deviations, while for the t t ¯ Z production in three- and four-lepton channels both the expected and the observed significances are found to be in excess of 5 standard deviations. The results are in agreement with the standard model predictions and are used to constrain the Wilson coefficients for eight dimension-six operators describing new interactions that would modify t t ¯ W and t t ¯ Z production.[Figure not available: see fulltext.].
URI: http://bura.brunel.ac.uk/handle/2438/18223
DOI: http://dx.doi.org/10.1007/JHEP08(2018)011
ISSN: 1126-6708
http://dx.doi.org/10.1007/JHEP08(2018)011
1029-8479
Appears in Collections:Dept of Electronic and Computer Engineering Research Papers

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