PoS - Proceedings of Science
Volume 340 - The 39th International Conference on High Energy Physics (ICHEP2018) - Posters
Measurement of $t\bar{t}$ production cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at $\sqrt{s}$=13 TeV
C. Hwang*  on behalf of the CMS Collaboration
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Published on: August 02, 2019
The cross sections for the production of $t\bar{t}b\bar{b}$ and ${t\bar{t}jj}$ and their ratio $\sigma_{t\bar{t}b\bar{b}}/\sigma_{t\bar{t}jj}$ are measured using data corresponding to an integrated luminosity of 2.3 fb$^{-1}$ collected in pp collisions at $\sqrt{s}$=13 TeV with the CMS detector at the LHC. Events with two leptons (e or $\mu$) and at least four reconstructed jets, including at least two identified as b quark jets, in the final state are selected. In the full phase space, the measured ratio is 0.022 $\pm$ 0.003 (stat) $\pm$ 0.006 (syst), the cross section $\sigma_{t\bar{t}b\bar{b}}$ is 4.0 $\pm$ 0.6 (stat) $\pm$ 1.3 (syst) pb and $\sigma_{t\bar{t}jj}$ is 184 $\pm$ 6 (stat) $\pm$ 33 (syst) pb . The measurements are compared with the standard model expectations obtained from a powheg simulation at next-to-leading-order interfaced with pythia.
DOI: https://doi.org/10.22323/1.340.0916
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