Abstract
A search for the standard model production of four top quarks (pp → mathrm{t}overline{mathrm{t}}mathrm{t}overline{mathrm{t}} ) is reported using single-lepton plus jets and opposite-sign dilepton plus jets signatures. Proton-proton collisions are recorded with the CMS detector at the LHC at a center-of-mass energy of 13 TeV in a sample corresponding to an integrated luminosity of 35.8 fb−1. A multivariate analysis exploiting global event and jet properties is used to discriminate mathrm{t}overline{mathrm{t}}mathrm{t}overline{mathrm{t}} from mathrm{t}overline{mathrm{t}} production. No significant deviation is observed from the predicted background. An upper limit is set on the cross section for mathrm{t}overline{mathrm{t}}mathrm{t}overline{mathrm{t}} production in the standard model of 48 fb at 95% confidence level. When combined with a previous measurement by the CMS experiment from an analysis of other final states, the observed signal significance is 1.4 standard deviations, and the combined cross section measurement is {13}_{-9}^{+11} fb. The result is also interpreted in the framework of effective field theory.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
