First measurement of the cross section for top-quark pair production in proton-proton collisions at √{s}=7 TeV
Abstract
The first measurement of the cross section for top-quark pair production in pp collisions at the Large Hadron Collider at center-of-mass energy √{s}=7 TeV has been performed using a data sample corresponding to an integrated luminosity of 3.1±0.3 pb recorded by the CMS detector. This result utilizes the final state with two isolated, highly energetic charged leptons, large missing transverse energy, and two or more jets. Backgrounds from Drell-Yan and non-W/Z boson production are estimated from data. Eleven events are observed in the data with 2.1±1.0 events expected from background. The measured cross section is 194±72(stat.)±24(syst.)±21(lumi.) pb, consistent with next-to-leading order predictions.
- Publication:
-
Physics Letters B
- Pub Date:
- January 2011
- DOI:
- 10.1016/j.physletb.2010.11.058
- arXiv:
- arXiv:1010.5994
- Bibcode:
- 2011PhLB..695..424K
- Keywords:
-
- High Energy Physics - Experiment
- E-Print:
- Phys.Lett.B695:424-443,2011