Imperial College London
Portrait Picture

Alexander Tapper

Faculty of Natural Sciences, Department of Physics

Professor of Physics
 
 
 
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Contact

 

+44 (0)20 7594 1551a.tapper Website

 
 
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Location

 

508Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Tumasyan:2023:10.1016/j.physletb.2023.138076,
author = {Tumasyan, A and Adam, W and Andrejkovic, JW and Bergauer, T and Chatterjee, S and Damanakis, K and Dragicevic, M and Escalante, Del Valle A and Hussain, PS and Jeitler, M and Krammer, N and Lechner, L and Liko, D and Mikulec, I and Paulitsch, P and Schieck, J and Schöfbeck, R and Schwarz, D and Sonawane, M and Templ, S and Waltenberger, W and Wulz, CE and Darwish, MR and Janssen, T and Kello, T and Rejeb, Sfar H and Van, Mechelen P and Bols, ES and D'Hondt, J and De, Moor A and Delcourt, M and El, Faham H and Lowette, S and Morton, A and Müller, D and Sahasransu, AR and Tavernier, S and Van, Doninck W and Van, Putte S and Vannerom, D and Clerbaux, B and Dansana, S and De, Lentdecker G and Favart, L and Hohov, D and Jaramillo, J and Lee, K and Mahdavikhorrami, M and Makarenko, I and Malara, A and Paredes, S and Pétré, L and Postiau, N and Thomas, L and Vanden, Bemden M and Vander, Velde C and Vanlaer, P and Dobur, D and Knolle, J and Lambrecht, L and Mestdach, G and Rendón, C and Samala},
doi = {10.1016/j.physletb.2023.138076},
journal = {Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics},
title = {Evidence for four-top quark production in proton-proton collisions at s=13TeV},
url = {http://dx.doi.org/10.1016/j.physletb.2023.138076},
volume = {844},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - 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 138fb−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+12fb. 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.
AU  - Tumasyan,A
AU  - Adam,W
AU  - Andrejkovic,JW
AU  - Bergauer,T
AU  - Chatterjee,S
AU  - Damanakis,K
AU  - Dragicevic,M
AU  - Escalante,Del Valle A
AU  - Hussain,PS
AU  - Jeitler,M
AU  - Krammer,N
AU  - Lechner,L
AU  - Liko,D
AU  - Mikulec,I
AU  - Paulitsch,P
AU  - Schieck,J
AU  - Schöfbeck,R
AU  - Schwarz,D
AU  - Sonawane,M
AU  - Templ,S
AU  - Waltenberger,W
AU  - Wulz,CE
AU  - Darwish,MR
AU  - Janssen,T
AU  - Kello,T
AU  - Rejeb,Sfar H
AU  - Van,Mechelen P
AU  - Bols,ES
AU  - D'Hondt,J
AU  - De,Moor A
AU  - Delcourt,M
AU  - El,Faham H
AU  - Lowette,S
AU  - Morton,A
AU  - Müller,D
AU  - Sahasransu,AR
AU  - Tavernier,S
AU  - Van,Doninck W
AU  - Van,Putte S
AU  - Vannerom,D
AU  - Clerbaux,B
AU  - Dansana,S
AU  - De,Lentdecker G
AU  - Favart,L
AU  - Hohov,D
AU  - Jaramillo,J
AU  - Lee,K
AU  - Mahdavikhorrami,M
AU  - Makarenko,I
AU  - Malara,A
AU  - Paredes,S
AU  - Pétré,L
AU  - Postiau,N
AU  - Thomas,L
AU  - Vanden,Bemden M
AU  - Vander,Velde C
AU  - Vanlaer,P
AU  - Dobur,D
AU  - Knolle,J
AU  - Lambrecht,L
AU  - Mestdach,G
AU  - Rendón,C
AU  - Samalan,A
AU  - Skovpen,K
AU  - Tytgat,M
AU  - Van,Den Bossche N
AU  - Vermassen,B
AU  - Wezenbeek,L
AU  - Benecke,A
AU  - Bruno,G
AU  - Bury,F
AU  - Caputo,C
AU  - David,P
AU  - Delaere,C
AU  - Donertas,IS
AU  - Giammanco,A
AU  - Jaffel,K
AU  - Jain,S
AU  - Lemaitre,V
AU  - Mondal,K
AU  - Taliercio,A
AU  - Tran,TT
AU  - Vischia,P
AU  - Wertz,S
AU  - Alves,GA
AU  - Coelho,E
AU  - Hensel,C
AU  - Moraes,A
AU  - Rebello,Teles P
AU  - Aldá,Júnior WL
AU  - Alves,Gallo Pereira M
AU  - Barroso,Ferreira Filho M
AU  - Brandao,Malbouisson H
AU  - Carvalho,W
AU  - Chinellato,J
AU  - Da,Costa EM
AU  - Da,Silveira GG
AU  - De,Jesus Damiao D
AU  - Dos,Santos Sousa V
AU  - Fonseca,De Souza S
DO  - 10.1016/j.physletb.2023.138076
PY  - 2023///
SN  - 0370-2693
TI  - Evidence for four-top quark production in proton-proton collisions at s=13TeV
T2  - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
UR  - http://dx.doi.org/10.1016/j.physletb.2023.138076
VL  - 844
ER  -
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