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https://hdl.handle.net/11147/5909| Title: | Measurement of the Cross Section Ratio Σtt¯bb¯/Σtt¯jj in Pp Collisions at S=8 Tev | Authors: | Karapınar, Güler CMS Collaboration Bergauer, T. Dragicevic, M. Malgeri, L. Tumasyan, A. |
Keywords: | Cms Physics Top Physics |
Publisher: | Elsevier B.V. | Source: | Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M.,...CMS Collaboration (2015). Measurement of the cross section ratio σttbb/σttjj in pp collisions at √s=8 TeV. Physics Letters, Section B, 746, 132-153. doi:10.1016/j.physletb.2015.04.060 | Abstract: | The first measurement of the cross section ratio σtt¯bb¯/σtt¯jj is presented using a data sample corresponding to an integrated luminosity of 19.6 fb−1 collected in pp collisions at s=8 TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and four reconstructed jets, including two identified as b quark jets, in the final state are selected. The ratio is determined for a minimum jet transverse momentum pT of both 20 and 40 GeV/c. The measured ratio is 0.022±0.003(stat)±0.005(syst) for pT>20 GeV/c. The absolute cross sections σtt¯bb¯ and σtt¯jj are also measured. The measured ratio for pT>40 GeV/c is compatible with a theoretical quantum chromodynamics calculation at next-to-leading order. © 2015 CERN for the benefit of the CMS Collaboration | URI: | https://doi.org/10.1016/j.physletb.2015.04.060 | ISSN: | 0370-2693 |
| Appears in Collections: | Mathematics / Matematik Rectorate / Rektörlük Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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