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J. Erö; M. Spanring; J. D’Hondt; Q. Python; C. De Oliveira Martins; H. S. Chen; F. Couderc; I. Kucher; E. C. Chabert; J. Fay; S. Ghosh; P. Millet; D. Teyssier; Y. Wen; A. Benecke; A. Karavdina; M. Niedziela; D. Nowatschin; O. Rieger; W. De Boer; G. Quast; T. Weiler; C. Wöhrmann; K. Vellidis; E. Paradas; J. Strologas; Z. Szillasi; Z. L. Trocsanyi; S. Choudhury; D. Bhowmik; P. K. Behera; R. Chudasama; K. Kothekar; A. Gelmi; S. Marcellini; S. Albergo; C. Civinini; S. Gennai; F. Simonetto; C. Cecchi; D. Del Re; S. Maselli; A. Da Rold; G. Oh; H. S. Kim; K. Nam; I. Heredia-De La Cruz; J. Varela; M. Gavrilenko; I. Golutvin; S. Shulha; V. Stolin; S. Troshin; M. C. Fouz; J. Duarte Campderros; N. Trevisani; N. Dupont; F. Moortgat; G. Petrucciani; S. Damarseckin; U. G. Tok; E. Gülmez; Y. Komurcu; L. Levchuk; E. Olaiya; D. Petyt; M. Della Negra; D. M. Raymond; C. Seez; S. Zahid; C. West; G. Landsberg; C. Flores; C. Bravo; J. W. Gary; G. Karapostoli; G. Kole; S. May; F. Würthwein; R. Bhandari; D. Anderson; J. Chaves; J. Chu; J. Duarte; F. Ravera; L. Uplegger; R. D. Field; D. Berry; R. R. Betts; H. Ogul; D. Hsu; M. Hu; F. Golf; K. A. Hahn; W. Shi; J. L. Dulemba; A. Khukhunaishvili; R. Taus; S. W. Lee; I. Volobouev
The European physical journal. C, Particles and fields, 11/2019, Letnik: 79, Številka: 11Journal Article
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.
