par Aaltonen, Timo;De Lentdecker, Gilles 
; [et al.]
Référence Physical review. D, Particles, fields, gravitation, and cosmology, 78, 11, 111101
Publication Publié, 2008
; [et al.]Référence Physical review. D, Particles, fields, gravitation, and cosmology, 78, 11, 111101
Publication Publié, 2008
Article révisé par les pairs
| Résumé : | We present the first measurement of σ(gg→tt̄)/ σ(pp̄→tt̄). We use 0.96fb-1 of s=1.96TeV pp̄ collision data recorded with the CDF II detector at Fermilab. Using charged particles with low transverse momentum in tt̄ events, we find σ(gg→ tt̄)/σ(pp̄→tt̄)=0.07±0.14(stat)±0. 07(syst), corresponding to a 95% confidence level upper limit of 0.33, in agreement with the standard model next-to-leading-order prediction of 0.15±0.05. © 2008 The American Physical Society. |
