Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/19947
Title: Search for the production of four top quarks in the single-lepton and opposite-sign dilepton final states in proton-proton collisions at √s = 13 TeV
Authors: Sirunyan, AM
Tumasyan, A
Adam, W
Ambrogi, F
Bergauer, T
Brandstetter, J
Dragicevic, M
Erö, J
Escalante Del Valle, A
Flechl, M
Frühwirth, R
Jeitler, M
Krammer, N
Krätschmer, I
Liko, D
Madlener, T
Mikulec, I
Rad, N
Schieck, J
Schöfbeck, R
Spanring, M
Spitzbart, D
Waltenberger, W
Wulz, CE
Zarucki, M
Drugakov, V
Mossolov, V
Suarez Gonzalez, J
Darwish, MR
De Wolf, EA
Di Croce, D
Janssen, X
Lauwers, J
Lelek, A
Pieters, M
Rejeb Sfar, H
Van Haevermaet, H
Van Mechelen, P
Van Putte, S
Van Remortel, N
Blekman, F
Bols, ES
Chhibra, SS
D’Hondt, J
De Clercq, J
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
Favart, L
Grebenyuk, A
Kalsi, AK
Luetic, J
Popov, A
Postiau, N
Starling, E
Thomas, L
Vander Velde, C
Vanlaer, P
Vannerom, D
Wang, Q
Cornelis, T
Dobur, D
Khvastunov, I
Roskas, C
Trocino, D
Tytgat, M
Verbeke, W
Vermassen, B
Vit, M
Zaganidis, N
Bondu, O
Bruno, G
Caputo, C
David, P
Delaere, C
Delcourt, M
Giammanco, A
Lemaitre, V
Magitteri, A
Prisciandaro, J
Saggio, A
Vidal Marono, M
Vischia, P
Zobec, J
Alves, FL
Keywords: Hadron-Hadron scattering (experiments);Top physics
Issue Date: 14-Nov-2019
Publisher: Springer Verlag
Citation: Journal of High Energy Physics, 2019, 2019 (11)
Abstract: A search for the standard model production of four top quarks (pp → t t ¯ t t ¯) is reported using single-lepton plus jets and opposite-sign dilepton plus jets signatures. Proton-proton collisions are recorded with the CMS detector at the LHC at a center-of-mass energy of 13 TeV in a sample corresponding to an integrated luminosity of 35.8 fb−1. A multivariate analysis exploiting global event and jet properties is used to discriminate t t ¯ t t ¯ from t t ¯ production. No significant deviation is observed from the predicted background. An upper limit is set on the cross section for t t ¯ t t ¯ production in the standard model of 48 fb at 95% confidence level. When combined with a previous measurement by the CMS experiment from an analysis of other final states, the observed signal significance is 1.4 standard deviations, and the combined cross section measurement is 13−9+11 fb. The result is also interpreted in the framework of effective field theory. [Figure not available: see fulltext.].
URI: http://bura.brunel.ac.uk/handle/2438/19947
DOI: http://dx.doi.org/10.1007/JHEP11(2019)082
ISSN: 1126-6708
http://dx.doi.org/10.1007/JHEP11(2019)082
1029-8479
Appears in Collections:Dept of Mechanical Aerospace and Civil Engineering Research Papers

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