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Related Experiment Videos

Radiative electroweak symmetry breaking revisited.

V Elias1, R B Mann, D G C McKeon

  • 1Perimeter Institute for Theoretical Physics, 35 King Street North, Waterloo, Ontario, Canada, N2J 2W9.

Physical Review Letters
|February 3, 2004
PubMed
Summary

Renormalization-group methods improve the effective potential for SU(2)xU(1) electroweak symmetry, suggesting a Higgs boson mass of 216 GeV. Stronger quantum chromodynamics (QCD) can restore the tree potential

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Area of Science:

  • Particle Physics
  • Quantum Field Theory

Background:

  • The effective potential in SU(2)xU(1) electroweak symmetry is crucial for understanding particle masses.
  • Previous calculations were limited by residual dependence on the renormalization mass scale.

Purpose of the Study:

  • To improve the effective potential calculation by summing leading-logarithm contributions to all orders.
  • To investigate the impact of quantum chromodynamics (QCD) on electroweak symmetry breaking.

Main Methods:

  • Utilized renormalization-group methods to sum leading-logarithm contributions.
  • Analyzed the effective potential for SU(2)xU(1) electroweak symmetry in the absence of a tree-level scalar-field mass.

Main Results:

  • The improved effective potential shows reduced dependence on the renormalization mass scale.

Related Experiment Videos

  • A plausible Higgs boson mass of 216 GeV is suggested by the all-orders summation.
  • A sufficiently strong QCD coupling restores the local minimum at phi=0.

    • Conclusions:

    • Renormalization-group summation provides a more robust effective potential for electroweak symmetry.
    • The Higgs boson mass is sensitive to both electroweak and QCD couplings.
    • Further studies are needed to explore the implications of these findings for the early universe.