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Pregled bibliografske jedinice broj: 1010566

Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at s√=13TeV


(CMS Collaboration) Sirunyan, Albert; ...; Đurić, Senka; Lelas, Damir; Godinović, Nikola; Puljak, Ivica; Šćulac, Toni; Mesić, Benjamin; Šuša, Tatjana; Kovač, Marko et al.
Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at s√=13TeV // European physical journal C : particles and fields, 78 (2018), 2; 140, 24 doi:10.1140/epjc/s10052-018-5607-5 (međunarodna recenzija, članak, znanstveni)


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Naslov
Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at s√=13TeV

Autori
Sirunyan, Albert ; ... ; Đurić, Senka ; Lelas, Damir ; Godinović, Nikola ; Puljak, Ivica ; Šćulac, Toni ; Mesić, Benjamin ; Šuša, Tatjana ; Kovač, Marko ; Ferenček, Dinko ; Antunović, Željko ; Starodumov, Andrey ; Brigljević, Vuko ; Luetić, Jelena ; Kadija, Krešo ; ... ; Woods, Nate

Kolaboracija
CMS Collaboration

Izvornik
European physical journal C : particles and fields (1434-6044) 78 (2018), 2; 140, 24

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
high energy physics ; experimental particle physics ; LHC ; CMS ; standard model

Sažetak
A search for standard model production of four top quarks (tt¯tt¯) is reported using events containing at least three leptons (e, μ) or a same-sign lepton pair. The events are produced in proton–proton collisions at a center-of-mass energy of 13TeV at the LHC, and the data sample, recorded in 2016, corresponds to an integrated luminosity of 35.9fb−1. Jet multiplicity and flavor are used to enhance signal sensitivity, and dedicated control regions are used to constrain the dominant backgrounds. The observed and expected signal significances are, respectively, 1.6 and 1.0 standard deviations, and the tt¯tt¯ cross section is measured to be 16.9+13.8−11.4 fb, in agreement with next-to-leading-order standard model predictions. These results are also used to constrain the Yukawa coupling between the top quark and the Higgs boson to be less than 2.1 times its expected standard model value at 95% confidence level.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Ustanove
Fakultet elektrotehnike, strojarstva i brodogradnje, Split,
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Split

Citiraj ovu publikaciju

(CMS Collaboration) Sirunyan, Albert; ...; Đurić, Senka; Lelas, Damir; Godinović, Nikola; Puljak, Ivica; Šćulac, Toni; Mesić, Benjamin; Šuša, Tatjana; Kovač, Marko et al.
Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at s√=13TeV // European physical journal C : particles and fields, 78 (2018), 2; 140, 24 doi:10.1140/epjc/s10052-018-5607-5 (međunarodna recenzija, članak, znanstveni)
(CMS Collaboration) (CMS Collaboration) Sirunyan, A., ..., Đurić, S., Lelas, D., Godinović, N., Puljak, I., Šćulac, T., Mesić, B., Šuša, T. & Kovač, M. (2018) Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at s√=13TeV. European physical journal C : particles and fields, 78 (2), 140, 24 doi:10.1140/epjc/s10052-018-5607-5.
@article{article, year = {2018}, pages = {24}, DOI = {10.1140/epjc/s10052-018-5607-5}, chapter = {140}, keywords = {high energy physics, experimental particle physics, LHC, CMS, standard model}, journal = {European physical journal C : particles and fields}, doi = {10.1140/epjc/s10052-018-5607-5}, volume = {78}, number = {2}, issn = {1434-6044}, title = {Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at s√=13TeV}, keyword = {high energy physics, experimental particle physics, LHC, CMS, standard model}, chapternumber = {140} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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