The European Physical Journal C > 2019 > 79 > 11 > 1-29
Search for new physics in top quark production in dilepton final states in proton-proton collisions at $$\sqrt{s} = 13\,\text {TeV} $$ s=13TeV
Source
Abstract
A search for new physics in top quark production is performed in proton-proton collisions at $$13\,\text {TeV} $$ 13TeV . The data set corresponds to an integrated luminosity of $$35.9{\,\text {fb}^{-1}} $$ 35.9fb-1 collected in 2016 with the CMS detector. Events with two opposite-sign isolated leptons (electrons or muons), and $$\mathrm{b}$$ b quark jets in the final state are selected. The search is sensitive to new physics in top quark pair production and in single top quark production in association with a $$\mathrm{W}$$ W boson. No significant deviation from the standard model expectation is observed. Results are interpreted in the framework of effective field theory and constraints on the relevant effective couplings are set, one at a time, using a dedicated multivariate analysis. This analysis differs from previous searches for new physics in the top quark sector by explicitly separating $$\mathrm{t}\mathrm{W}$$ tW from $$\mathrm{t}{\bar{\mathrm{t}}}$$ tt¯ events and exploiting the specific sensitivity of the $$\mathrm{t}\mathrm{W}$$ tW process to new physics.
Identifiers
journal ISSN : | 1434-6044 |
journal e-ISSN : | 1434-6052 |
DOI | 10.1140/epjc/s10052-019-7387-y |