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Measurement of the Electric Charge of the Top Quark in $\boldsymbol{t\bar{t}}$ Events

Abstract : We present a measurement of the electric charge of top quarks using $t\bar{t}$ events produced in $p\bar{p}$ collisions at the Tevatron. The analysis is based on fully reconstructed $t\bar{t}$ pairs in lepton+jets final states. Using data corresponding to 5.3 $\rm fb^{-1}$ of integrated luminosity, we exclude the hypothesis that the top quark has a charge of $Q=-4/3\,e$ at a significance greater than 5 standard deviations. We also place an upper limit of 0.46 on the fraction of such quarks that can be present in an admixture with the standard model top quarks ($Q=+2/3\,e$) at a 95\% confidence level.
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Submitted on : Monday, July 21, 2014 - 8:28:53 AM
Last modification on : Thursday, February 25, 2021 - 10:58:33 AM

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V.M. Abazov, G. Sajot, J. Stark, S. Greder, F. Miconi, et al.. Measurement of the Electric Charge of the Top Quark in $\boldsymbol{t\bar{t}}$ Events. Physical Review D, American Physical Society, 2014, 90, pp.051101(R). ⟨10.1103/PhysRevD.90.051101⟩. ⟨in2p3-01026175⟩



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