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Linking the supersymmetric standard model to the cosmological constant

Yu-Cheng Qiu, S.-H. Henry Tye

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Abstract

String theory has no parameter except the string scale MS, so the Planck scale MPl, the supersymmetry-breaking scale m✘susy✘, the electroweak scale mEW as well as the vacuum energy density (cosmological constant) Λ are to be determined dynamically at any local minimum solution in the string theory landscape. Here we consider a model that links the supersymmetric electroweak phenomenology (bottom up) to the string theory motivated flux compactification approach (top down). In this model, supersymmetry is broken by a combination of the racetrack Kähler uplift mechanism, which naturally allows an exponentially small positive Λ in a local minimum, and the anti-D3-brane in the KKLT scenario. In the absence of the Higgs doublets in the supersymmetric standard model, one has either a small Λ or a big enough m✘susy✘, but not both. The introduction of the Higgs fields (with their soft terms) allows a small Λ and a big enough m✘susy✘ simultaneously. Since an exponentially small Λ is statistically preferred (as the properly normalized probability distribution P(Λ) diverges at Λ = 0+), identifying the observed Λobs to the median value Λ50% yields mEW ∼ 100 GeV. We also find that the warped anti-D3-brane tension has a SUSY-breaking scale M✘susy✘ ∼ 100 mEW while the SUSY-breaking scale that directly correlates with the Higgs fields in the visible sector m✘susy✘ ≈ mEW. © The Authors.
Original languageEnglish
Article number117
JournalJournal of High Energy Physics
Volume2021
Online published20 Jan 2021
DOIs
Publication statusPublished - 2021
Externally publishedYes

Bibliographical note

Information for this record is supplemented by the author(s) concerned.

Research Keywords

  • hep-th
  • hep-ph
  • Flux compactifications
  • Superstring Vacua
  • Supersymmetric Standard Model
  • Supersymmetry Breaking

Publisher's Copyright Statement

  • This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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