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Is radiative electroweak symmetry breaking consistent with a 125 GeV Higgs mass?

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Radiative electroweak symmetry breaking dynamically predicts Higgs mass, unlike conventional methods. This study extends predictions to nine loops, finding a 124 GeV Higgs mass consistent with observations and enhanced self-coupling.

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Area of Science:

  • High-energy physics
  • Standard Model physics
  • Electroweak symmetry breaking

Background:

  • Conventional symmetry breaking treats Higgs mass as a parameter.
  • Radiative electroweak symmetry breaking (RESB) dynamically predicts Higgs mass via loop corrections.
  • Understanding RESB is crucial for refining the Standard Model.

Purpose of the Study:

  • To extend Higgs mass predictions in RESB to higher loop orders.
  • To investigate the implications of RESB on Higgs self-coupling and scattering processes.
  • To identify observable signatures distinguishing RESB from conventional symmetry breaking.

Main Methods:

  • Utilized Padé approximations and an averaging method.
  • Extended Higgs mass predictions from five to nine-loop order in the scalar sector.
  • Analyzed Higgs self-coupling and scattering processes (e.g., HH→HH, WL(+)WL(+)→HH, ZLZL→HH).

Main Results:

  • Established an upper bound on Higgs mass at 141 GeV.
  • Converged to an asymptotic Higgs mass of 124 GeV, aligning with ATLAS and CMS data.
  • Found a significantly enhanced Higgs self-coupling (λ=0.23) compared to conventional breaking.
  • Observed enhanced scattering processes WL(+)WL(+)→HH and ZLZL→HH.

Conclusions:

  • The study provides strong evidence for RESB's predictive power for Higgs mass.
  • Enhanced Higgs self-coupling and specific scattering processes serve as potential experimental signatures for RESB.
  • Findings contribute to a deeper understanding of electroweak symmetry breaking mechanisms.