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W′ production at the LHC in the four-site Higgsless model

Elena Accomando* and Diego Becciolini†

Stefania De Curtis‡

Daniele Dominici§ and Luca Fedeli∥

  • NExT Institute and School of Physics and Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom

  • Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Italy

  • Università degli Studi di Firenze, Dipartimento di Fisica e Astronomia, Firenze, Italy, and Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Italy

  • *E.Accomando@soton.ac.uk
  • †diego.becciolini@soton.ac.uk
  • ‡decurtis@fi.infn.it
  • §dominici@fi.infn.it
  • ∥fedeli@fi.infn.it
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Phys. Rev. D 84, 115014 – Published 20 December, 2011

DOI: https://doi.org/10.1103/PhysRevD.84.115014

Abstract

We study the phenomenology of the four-site Higgsless model, based on the SU(2)L×SU(2)1×SU(2)2×U(1)Y gauge symmetry, at present colliders. The model predicts the existence of two neutral and four charged extra gauge bosons, Z1,2 and W1,2±. In this paper, we focus on the charged gauge sector. We first derive limits on W1,2-boson masses and couplings to SM fermions from direct searches at the Tevatron. We then estimate at the 7 TeV LHC the exclusion limits with the actual L=1  fb−1 and the discovery potential with the expected L=10  fb−1. In contrast to the minimal (or three-site) Higgsless model which predicts almost fermiophobic extra gauge bosons, the next-to-minimal (or four-site) Higgsless model recovers sizable W1,2-boson couplings to ordinary matter, expressing the nonfermiophobic multiresonance inner nature of extra-dimensional theories. Owing to this feature, we find that in one year from now the new heavy gauge bosons, W1,2±, could be discovered in the final state with an electron and large missing transverse energy at the 7 TeV LHC for W1,2-boson masses in the TeV region, depending on model parameters.

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Phys. Rev. D 84, 115014– Published 20 December, 2011
  • Received 14 September 2011

© 2011 American Physical Society

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