Measurement of the tt¯bb¯ production cross section in the all-jet final state in pp collisions at √s = 13 TeV

Sirunyan, Albert M; ...; Antunović, Željko; Brigljević, Vuko; Ceci, Saša; Ferenček, Dinko; Giljanović, Duje; Godinović, Nikola; Kadija, Krešo; Kovač, Marko; Lelas, Damir; Majumder, Devdatta; Mesić, Benjamin; Puljak, Ivica; Roguljić, Matej; Starodumov, Andrey; Đurić, Senka; Šuša, Tatjana; Šćulac, Toni; ...; Woods, Nathaniel

doi:10.1016/j.physletb.2020.135285

Pregled bibliografske jedinice broj: 1108600

Measurement of the tt¯bb¯ production cross section in the all-jet final state in pp collisions at √s = 13 TeV

(CMS Collaboration) Sirunyan, Albert M; ...; Antunović, Željko; Brigljević, Vuko; Ceci, Saša; Ferenček, Dinko; Giljanović, Duje; Godinović, Nikola; Kadija, Krešo; Kovač, Marko et al.

Measurement of the tt¯bb¯ production cross section in the all-jet final state in pp collisions at √s = 13 TeV // Physics letters. B, 803 (2020), 135285, 26 doi:10.1016/j.physletb.2020.135285 (međunarodna recenzija, članak, znanstveni)

CROSBI ID: 1108600 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Measurement of the tt¯bb¯ production cross section in the all-jet final state in pp collisions at √s = 13 TeV

Autori
Sirunyan, Albert M ; ... ; Antunović, Željko ; Brigljević, Vuko ; Ceci, Saša ; Ferenček, Dinko ; Giljanović, Duje ; Godinović, Nikola ; Kadija, Krešo ; Kovač, Marko ; Lelas, Damir ; Majumder, Devdatta ; Mesić, Benjamin ; Puljak, Ivica ; Roguljić, Matej ; Starodumov, Andrey ; Đurić, Senka ; Šuša, Tatjana ; Šćulac, Toni ; ... ; Woods, Nathaniel

Kolaboracija
CMS Collaboration

Izvornik
Physics letters. B (0370-2693) 803 (2020); 135285, 26

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

Ključne riječi
High energy physics ; Experimental particle physics ; LHC ; CMS ; Particle Physics Experiments ; Physics ; Vector boson scattering ; Hadron-Hadron scattering (experiments) ; Supersymmetry ; Higgs physics ; Particle and resonance production ; B physics ; Particle correlations and fluctuations ; Quarkonium ; Elementary Particles and Fields ; Beyond Standard Model ; Jets ; QCD ; Top physics ; Diboson ; Electroweak ; CKM matrix ; Top quark ; Large detector-systems performance ; Pattern recognition

Sažetak
A measurement of the production cross section of top quark pairs in association with two b jets (tt¯bb¯) is presented using data collected in proton-proton collisions at s√= 13 TeV by the CMS detector at the LHC corresponding to an integrated luminosity of 35.9 fb−1. The cross section is measured in the all-jet decay channel of the top quark pair by selecting events containing at least eight jets, of which at least two are identified as originating from the hadronization of b quarks. A combination of multivariate analysis techniques is used to reduce the large background from multijet events not containing a top quark pair, and to help discriminate between jets originating from top quark decays and other additional jets. The cross section is determined for the total phase space to be 5.5 ± 0.3 (stat) +1.6−1.3 (syst) pb and also measured for two fiducial tt¯bb¯ definitions. The measured cross sections are found to be larger than theoretical predictions by a factor of 1.5-2.4, corresponding to 1-2 standard deviations.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA

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

Profili:

Matej Roguljić (autor)