Measurement of spin correlations in t t-bar production using the matrix element method in the muon + jets final state in pp collisions at sqrt(s) = 8 TeV

Khachatryan, Vardan; ...; Pleština, R.; …; Godinović, Nikola; Lelas, Damir; Puljak, Ivica; ...; Antunović, Željko; Kovač, Marko; Brigljević, Vuko; Kadija, Krešo; Luetić, Jelena; Mićanović, Saša; Sudić, Lucija; ...; Morović, Srećko; ...; Ferenček, Dinko; ...; Đurić, Senka; ...; Woods, Nate

doi:10.1016/j.physletb.2016.05.005

Pregled bibliografske jedinice broj: 875637

Measurement of spin correlations in t t-bar production using the matrix element method in the muon + jets final state in pp collisions at sqrt(s) = 8 TeV

Khachatryan, Vardan; ...; Pleština, R.; …; Godinović, Nikola; Lelas, Damir; Puljak, Ivica; ...; Antunović, Željko; Kovač, Marko et al.

Measurement of spin correlations in t t-bar production using the matrix element method in the muon + jets final state in pp collisions at sqrt(s) = 8 TeV // Physics letters B, 758 (2016), 321-346 doi:10.1016/j.physletb.2016.05.005 (međunarodna recenzija, članak, znanstveni)

CROSBI ID: 875637 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Measurement of spin correlations in t t-bar production using the matrix element method in the muon + jets final state in pp collisions at sqrt(s) = 8 TeV

Autori
Khachatryan, Vardan ; ... ; Pleština, R. ; … ; Godinović, Nikola ; Lelas, Damir ; Puljak, Ivica ; ... ; Antunović, Željko ; Kovač, Marko ; Brigljević, Vuko ; Kadija, Krešo ; Luetić, Jelena ; Mićanović, Saša ; Sudić, Lucija ; ... ; Morović, Srećko ; ... ; Ferenček, Dinko ; ... ; Đurić, Senka ; ... ; Woods, Nate

Izvornik
Physics letters B (0370-2693) 758 (2016); 321-346

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

Ključne riječi
High energy physics, Experimental particle physics, LHC, CMS, Standard Model

Sažetak
The consistency of the spin correlation strength in top quark pair production with the standard model (SM) prediction is tested in the muon + jets final state. The events are selected from pp collisions, collected by the CMS detector, at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.7 inverse femtobarns. The data are compared with the expectation for the spin correlation predicted by the SM and with the expectation of no correlation. Using a template fit method, the fraction of events that show SM spin correlations is measured to be 0.72 +/- 0.08 (stat) +0.15 -0.13 (syst), representing the most precise measurement of this quantity in the lepton + jets final state to date.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA

Projekti:
HRZZ-7118
HRZZ-09.01/346 - Potraga za novim standardnim modelom elementarnih čestica na LHC-u: od preciznih mjerenja elektroslabih procesa do direktnih potraga za novom fizikom (Brigljević, Vuko, HRZZ ) ( CroRIS)

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

Profili:

Senka Đurić (autor)