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Global effective-field-theory analysis of new-physics effects in (semi)leptonic kaon decays

  • Regular Article - Theoretical Physics
  • Open access
  • Published: 14 December 2016
  • Volume 2016, article number 52, (2016)
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Journal of High Energy Physics Aims and scope Submit manuscript
Global effective-field-theory analysis of new-physics effects in (semi)leptonic kaon decays
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  • Martín González-Alonso1 &
  • Jorge Martin Camalich2 
  • 703 Accesses

  • 65 Citations

  • 8 Altmetric

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A preprint version of the article is available at arXiv.

Abstract

We analyze the decays K → πℓν and P → ℓν (P = K, π, ℓ = e, μ) using a low-energy Effective-Field-Theory approach to parametrize New Physics and study the complementarity with baryon β decays. We then provide a road map for a global analysis of the experimental data, with all the Wilson coefficients simultaneously, and perform a fit leading to numerical bounds for them and for V us . A prominent result of our analysis is a reinterpretation of the well-known V ud − V us diagram as a strong constraint on new physics. Finally, we reinterpret our bounds in terms of the SU(2) L × U(1) Y -invariant operators, provide bounds to the corresponding Wilson coefficients at the TeV scale and compare our results with collider searches at the LHC.

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  1. IPN de Lyon/CNRS, Universite Lyon 1, Villeurbanne, France

    Martín González-Alonso

  2. CERN, Theoretical Physics Department, Geneva, Switzerland

    Jorge Martin Camalich

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  1. Martín González-Alonso
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  2. Jorge Martin Camalich
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Correspondence to Jorge Martin Camalich.

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ArXiv ePrint: 1605.07114

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González-Alonso, M., Camalich, J.M. Global effective-field-theory analysis of new-physics effects in (semi)leptonic kaon decays. J. High Energ. Phys. 2016, 52 (2016). https://doi.org/10.1007/JHEP12(2016)052

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  • Received: 23 June 2016

  • Revised: 18 November 2016

  • Accepted: 22 November 2016

  • Published: 14 December 2016

  • DOI: https://doi.org/10.1007/JHEP12(2016)052

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Keywords

  • Beyond Standard Model
  • Effective field theories
  • Kaon Physics
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