Evidence for four-top quark production in proton-proton collisions at √s = 13 TeV

Tumasyan, A; Adam, W; Andrejkovic, JW; Bergauer, T; Chatterjee, S; Damanakis, K; Dragicevic, M; Escalante Del Valle, A; Hussain, PS; Jeitler, M; Krammer, N; Van Den Bossche, N; Vermassen, B; Wezenbeek, L; Benecke, A; Bruno, G; Bury, F; Caputo, C; David, P; Delaere, C; Donertas, IS; Giammanco, A; Jaffel, K; Jain, S; Lemaitre, V; Mondal, K; Taliercio, A; Tran, TT; Vischia, P; Wertz, S; Alves, GA; Coelho, E; Hensel, C; Moraes, A; Rebello Teles, P; Aldá Júnior, WL; Alves Gallo Pereira, M; Barroso Ferreira Filho, M; Brandao Malbouisson, H; Carvalho, W; Reid, ID; Chinellato, J; Da Costa, EM; Da Silveira, GG; Kyberd, P; De Jesus Damiao, D; Dos Santos Sousa, V; Khan, A; Fonseca De Souza, S; Cole, JE; Coldham, K; Lechner, L; Liko, D; Mikulec, I; Paulitsch, P; Schieck, J; Schöfbeck, R; Schwarz, D; Sonawane, M; Templ, S; Waltenberger, W; Wulz, CE; Darwish, MR; Janssen, T; Kello, T; Rejeb Sfar, H; Van Mechelen, P; Bols, ES; D'Hondt, J; De Moor, A; Delcourt, M; El Faham, H; Lowette, S; Morton, A; Müller, D; Sahasransu, AR; Tavernier, S; Van Doninck, W; Van Putte, S; Vannerom, D; Clerbaux, B; Dansana, S; De Lentdecker, G; Favart, L; Hohov, D; Jaramillo, J; Lee, K; Mahdavikhorrami, M; Makarenko, I; Malara, A; Paredes, S; Pétré, L; Postiau, N; Thomas, L; Vanden Bemden, M; Vander Velde, C; Vanlaer, P; Dobur, D; Knolle, J; Lambrecht, L; Mestdach, G; Rendón, C; Samalan, A; Skovpen, K; Tytgat, M

Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/27941

Title:	Evidence for four-top quark production in proton-proton collisions at √s = 13 TeV
Authors:	Tumasyan, A Adam, W Andrejkovic, JW Bergauer, T Chatterjee, S Damanakis, K Dragicevic, M Escalante Del Valle, A Hussain, PS Jeitler, M Krammer, N Van Den Bossche, N Vermassen, B Wezenbeek, L Benecke, A Bruno, G Bury, F Caputo, C David, P Delaere, C Donertas, IS Giammanco, A Jaffel, K Jain, S Lemaitre, V Mondal, K Taliercio, A Tran, TT Vischia, P Wertz, S Alves, GA Coelho, E Hensel, C Moraes, A Rebello Teles, P Aldá Júnior, WL Alves Gallo Pereira, M Barroso Ferreira Filho, M Brandao Malbouisson, H Carvalho, W Reid, ID Chinellato, J Da Costa, EM Da Silveira, GG Kyberd, P De Jesus Damiao, D Dos Santos Sousa, V Khan, A Fonseca De Souza, S Cole, JE Coldham, K Lechner, L Liko, D Mikulec, I Paulitsch, P Schieck, J Schöfbeck, R Schwarz, D Sonawane, M Templ, S Waltenberger, W Wulz, CE Darwish, MR Janssen, T Kello, T Rejeb Sfar, H Van Mechelen, P Bols, ES D'Hondt, J De Moor, A Delcourt, M El Faham, H Lowette, S Morton, A Müller, D Sahasransu, AR Tavernier, S Van Doninck, W Van Putte, S Vannerom, D Clerbaux, B Dansana, S De Lentdecker, G Favart, L Hohov, D Jaramillo, J Lee, K Mahdavikhorrami, M Makarenko, I Malara, A Paredes, S Pétré, L Postiau, N Thomas, L Vanden Bemden, M Vander Velde, C Vanlaer, P Dobur, D Knolle, J Lambrecht, L Mestdach, G Rendón, C Samalan, A Skovpen, K Tytgat, M
Keywords:	CMS;top quark
Issue Date:	17-Jul-2023
Publisher:	Elsevier
Citation:	Tumasyan, A. et al. for the CMS Collaboration (2023) 'Evidence for four-top quark production in proton-proton collisions at √s = 13 TeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 844, 138076, pp. 1 - 25. doi: 10.1016/j.physletb.2023.138076.
Abstract:	Copyright © 2023 The Author(s). The production of four top quarks (tt¯tt¯) is studied with LHC proton-proton collision data samples collected by the CMS experiment at a center-of-mass energy of 13 TeV, and corresponding to integrated luminosities of up to 138 fb−1. Events that have no leptons (all-hadronic), one lepton, or two opposite-sign leptons (where lepton refers only to prompt electrons or prompt muons) are considered. This is the first tt¯tt¯ measurement that includes the all-hadronic final state. The observed significance of the tt¯tt¯ signal in these final states of 3.9 standard deviations (1.5 expected) provides evidence for tt¯tt¯ production, with a measured cross section of 36−11+12 fb. Combined with earlier CMS results in other final states, the signal significance is 4.0 standard deviations (3.2 expected). The combination returns an observed cross section of 17 ±4 (stat) ±3 (syst) fb, which is consistent with the standard model prediction.
Description:	Data availability: Release and preservation of data used by the CMS Collaboration as the basis for publications is guided by the CMS policy as stated in “CMS data preservation, re-use and open access policy” (https://cms-docdb.cern.ch/cgi-bin/PublicDocDB/RetrieveFile?docid=6032&filename=CMSDataPolicyV1.2.pdf&version=2). A preprint of this article was made available at arXiv, arXiv:2303.03864 [hep-ex]. It was replaced with the published version. All the figures and tables can be found at: http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-21-005 (CMS Public Pages). Report number: CMS-TOP-21-005, CERN-EP-2023-014.
URI:	https://bura.brunel.ac.uk/handle/2438/27941
DOI:	https://doi.org/10.1016/j.physletb.2023.138076
ISSN:	0370-2693
Other Identifiers:	ORCID iD Joanne E. Cole https://orcid.org/0000-0001-5638-7599 ORCID iD: Akram Khan https://orcid.org/0000-0002-4597-4402 ORCID iD: Paul Kyberd https://orcid.org/0000-0002-7353-7090 ORCID iD: Ivan D. Reid https://orcid.org/0000-0002-9235-779X 138076
Appears in Collections:	Dept of Electronic and Electrical Engineering Research Papers

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