Measurements of tt¯ cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at s=13TeV
Yazarlar (1)
Doç. Dr. Mustafa Numan BAKIRCI Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Makale Türü Açık Erişim Özgün Makale (SCOPUS dergilerinde yayınlanan tam makale)
Dergi Adı Physics Letters Section B Nuclear Elementary Particle and High Energy Physics
Dergi ISSN 0370-2693 Wos Dergi Scopus Dergi
Makale Dili İngilizce Basım Tarihi 01-2018
Cilt / Sayı / Sayfa 776 / 1 / 355–378 DOI 10.1016/j.physletb.2017.11.043
Makale Linki https://www.sciencedirect.com/science/article/am/pii/S0370269317309358
UAK Araştırma Alanları
Fen Bilimleri ve Matematik
Özet
The cross sections for the production of t t¯ b b¯ and t t¯ jj events and their ratio σ t t¯ b b¯/σ t t¯ jj are measured using data corresponding to an integrated luminosity of 2.3 fb− 1 collected in pp collisions at s= 13 TeV with the CMS detector at the LHC. Events with two leptons (e or μ) 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±0.003 (stat)±0.006 (syst), the cross section σ t t¯ b b¯ is 4.0±0.6 (stat)±1.3 (syst) pb and σ t t¯ jj is 184±6 (stat)±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.
Anahtar Kelimeler
CMS | Physics | Top quark