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New physics contribution to neutral trilinear gauge boson couplings

  • Regular Article - Theoretical Physics
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Abstract

We study the one-loop new physics effects to the CP even triple neutral gauge boson vertices γ ⋆ γ Z, γ ⋆ Z Z, Z ⋆ Z γ and Z ⋆ ZZ in the context of Little Higgs models. We compute the contribution of the additional fermions in Little Higgs models in the framework of direct product groups where [SU(2)×U(1)]2 gauge symmetry is embedded in SU(5) global symmetry and also in the framework of the simple group where SU(N)×U(1) gauge symmetry breaks down to SU(2) L ×U(1). We calculate the contribution of the fermions to these couplings when T parity is invoked. In addition, we re-examine the MSSM contribution at the chosen point of SPS1a′ and compare with the SM and Little Higgs models.

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Authors and Affiliations

  1. SGTB Khalsa College, University of Delhi, Delhi, 110007, India

    Sukanta Dutta &  Mamta

  2. Department of Physics & Astrophysics, University of Delhi, Delhi, 110007, India

    Ashok Goyal

Authors
  1. Sukanta Dutta
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  2. Ashok Goyal
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  3. Mamta
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Correspondence to Mamta.

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Dutta, S., Goyal, A. & Mamta New physics contribution to neutral trilinear gauge boson couplings. Eur. Phys. J. C 63, 305–315 (2009). https://doi.org/10.1140/epjc/s10052-009-1103-2

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  • DOI: https://doi.org/10.1140/epjc/s10052-009-1103-2

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