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Search for pair production of excited top quarks in the lepton+jets final state


Chatrchyan, S.; ...; Godinović, Nikola; Lelas, Damir; Pleština, Roko; Polić, Dunja; Puljak, Ivica; Antunović, Željko; Kovač, Marko; Brigljević, Vuko et al.
Search for pair production of excited top quarks in the lepton+jets final state // Journal of High Energy Physics, 1406 (2014), 125-1 doi:10.1007/JHEP06(2014)125 (međunarodna recenzija, članak, znanstveni)


Naslov
Search for pair production of excited top quarks in the lepton+jets final state

Autori
Chatrchyan, S. ; ... ; Godinović, Nikola ; Lelas, Damir ; Pleština, Roko ; Polić, Dunja ; Puljak, Ivica ; Antunović, Željko ; Kovač, Marko ; Brigljević, Vuko ; Đurić, Senka ; Kadija, Krešo ; Luetić, Jelena ; Mekterović, Darko ; Morović, Srećko ; Tikvica, Lucija ; ... ; Swanson, J.

Izvornik
Journal of High Energy Physics (1029-8479) 1406 (2014); 125-1

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

Ključne riječi
Hadron-Hadron Scattering; Top physics

Sažetak
A search is performed for pair-produced spin-3/2 excited top quarks (t∗¯t ∗ ), each decaying to a top quark and a gluon. The search uses data collected with the CMS detector from pp collisions at a center-of-mass energy of √ s = 8 TeV, selecting events that have a single isolated muon or electron, an imbalance in transverse momentum, and at least six jets, of which one must be compatible with originating from the fragmentation of a b quark. The data, corresponding to an integrated luminosity of 19.5 fb−1 , show no significant excess over standard model predictions, and provide a lower limit of 803 GeV at 95% confidence on the mass of the spin-3/2 t∗ quark in an extension of the RandallSundrum model, assuming a 100% branching fraction of its decay into a top quark and a gluon. This is the first search for a spin-3/2 excited top quark performed at the LHC.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
023-0982887-3064 - Potraga za Higgsovim bozonom i novom fizikom detektorom CMS (Ivica Puljak, )
098-0982887-2878 - Eksperimentalna fizika na LHC energijama (Krešo Kadija, )

Ustanove
Fakultet elektrotehnike, strojarstva i brodogradnje, Split,
Institut "Ruđer Bošković", Zagreb

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


Citati