Stringent limits on top-quark compositeness from tt¯ production at the Tevatron and the LHC

M. Fabbrichesi, M. Pinamonti, and A. Tonero
Phys. Rev. D 89, 074028 – Published 11 April 2014

Abstract

If the top quark is a composite state made out of some constituents, then its interaction with the gluon will be modified. We introduce the leading effective operators that contribute to the radius and anomalous magnetic moment of the top quark and study their effect on the cross section for tt¯ production at the Tevatron and the LHC. Current measurements of the cross sections set a stringent limit on the scale of compositeness. This limit is comparable to similar limits obtained for light quarks and those from electroweak precision measurements. It can be used to constrain the parameter space of some composite Higgs models.

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  • Received 19 September 2013

DOI:https://doi.org/10.1103/PhysRevD.89.074028

© 2014 American Physical Society

Authors & Affiliations

M. Fabbrichesi1, M. Pinamonti2, and A. Tonero3

  • 1Sezione di Trieste, INFN, 34136 Trieste, Italy
  • 2Gruppo collegato di Udine, Sezione di Trieste, INFN and SISSA, via Bonomea 265, 34136 Trieste, Italy
  • 3ICTP South American Institute for Fundamental Research & Instituto de Física Teórica, UNESP, Rua Dr. Bento T. Ferraz 271, 01140-070 São Paulo, São Paulo, Brazil

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Vol. 89, Iss. 7 — 1 April 2014

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