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Exploration of the tensor structure of the Higgs boson coupling to weak bosons in e + e − collisions

  • Regular Article - Theoretical Physics
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  • Published: 19 February 2015
  • Volume 2015, article number 128, (2015)
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Journal of High Energy Physics Aims and scope Submit manuscript
Exploration of the tensor structure of the Higgs boson coupling to weak bosons in e + e − collisions
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  • Gilad Amar1,
  • Shankha Banerjee2,
  • Stefan von Buddenbrock3,
  • Alan S. Cornell1,
  • Tanumoy Mandal2,
  • Bruce Mellado3 &
  • …
  • Biswarup Mukhopadhyaya2 

  • 587 Accesses

  • 25 Citations

  • 1 Altmetric

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A preprint version of the article is available at arXiv.

Abstract

Probing signatures of anomalous interactions of the Higgs boson with pairs of weak vector bosons is an important goal of an e + e − collider commissioned as a Higgs factory. We perform a detailed analysis of such potential of a collider operating at 250 − 300 GeV. Mostly using higher dimensional operators in a gauge-invariant framework, we show that substantial information on anomalous couplings can be extracted from the total rates of s-and t-channel Higgs production. The most obvious kinematic distributions, based on angular dependence of matrix elements, are relatively less sensitive with moderate coefficients of anomalous couplings, unless one goes to higher centre-of-mass energies. Some important quantities to use here, apart from the total event rates, are the ratios of event rates at different energies, ratios of s-and t-channel rates at fixed energies, and under some fortunate circumstances, the correlated changes in the rates for W-boson pair-production. A general scheme of calculating rates with as many as four gauge-invariant operators is also outlined. At the end, we perform a likelihood analysis using phenomenological parametrization of anomalous HWW interaction, and indicate their distinguishability for illustrative values of the strength of such interactions.

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Authors and Affiliations

  1. National Institute for Theoretical Physics, School of Physics, University of the Witwatersrand, Wits, 2050, South Africa

    Gilad Amar & Alan S. Cornell

  2. Regional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad, 211019, India

    Shankha Banerjee, Tanumoy Mandal & Biswarup Mukhopadhyaya

  3. School of Physics, University of the Witwatersrand, Wits, 2050, South Africa

    Stefan von Buddenbrock & Bruce Mellado

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  1. Gilad Amar
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  2. Shankha Banerjee
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  5. Tanumoy Mandal
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Correspondence to Tanumoy Mandal.

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ArXiv ePrint: 1405.3957

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Amar, G., Banerjee, S., von Buddenbrock, S. et al. Exploration of the tensor structure of the Higgs boson coupling to weak bosons in e + e − collisions. J. High Energ. Phys. 2015, 128 (2015). https://doi.org/10.1007/JHEP02(2015)128

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  • Received: 20 September 2014

  • Revised: 28 December 2014

  • Accepted: 21 January 2015

  • Published: 19 February 2015

  • DOI: https://doi.org/10.1007/JHEP02(2015)128

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Keywords

  • Higgs Physics
  • Beyond Standard Model
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