A solution to the electroweak horizon problem in the Rh= ct universe

Research output: Contribution to journalLetter

5 Citations (Scopus)

Abstract

Particle physics suggests that the Universe may have undergone several phase transitions, including the well-known inflationary event associated with the separation of the strong and electroweak forces in grand unified theories. The accelerated cosmic expansion during this transition, at cosmic time t∼ 10 - 36- 10 - 33 s, is often viewed as an explanation for the uniformity of the CMB temperature, T, which would otherwise have required inexplicable initial conditions. With the discovery of the Higgs particle, it is now quite likely that the Universe underwent another (electroweak) phase transition, at T= 159.5 ± 1.5 GeV – roughly ∼ 10 - 11 s after the big bang. During this event, the fermions gained mass and the electric force separated from the weak force. There is currently no established explanation, however, for the apparent uniformity of the vacuum expectation value of the Higgs field which, like the uniformity in T, gives rise to its own horizon problem in standard ΛCDM cosmology. We show in this paper that a solution to the electroweak horizon problem may be found in the choice of cosmological model, and demonstrate that this issue does not exist in the alternative Friedmann–Robertson–Walker cosmology known as the Rh= ct universe.

Original languageEnglish (US)
Article number739
JournalEuropean Physical Journal C
Volume78
Issue number9
DOIs
StatePublished - Sep 1 2018

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Cosmology
horizon
universe
Phase transitions
cosmology
Fermions
High energy physics
grand unified theory
Vacuum
fermions
vacuum
physics
expansion
Temperature
temperature

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cite this

A solution to the electroweak horizon problem in the Rh= ct universe. / Melia, Fulvio.

In: European Physical Journal C, Vol. 78, No. 9, 739, 01.09.2018.

Research output: Contribution to journalLetter

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abstract = "Particle physics suggests that the Universe may have undergone several phase transitions, including the well-known inflationary event associated with the separation of the strong and electroweak forces in grand unified theories. The accelerated cosmic expansion during this transition, at cosmic time t∼ 10 - 36- 10 - 33 s, is often viewed as an explanation for the uniformity of the CMB temperature, T, which would otherwise have required inexplicable initial conditions. With the discovery of the Higgs particle, it is now quite likely that the Universe underwent another (electroweak) phase transition, at T= 159.5 ± 1.5 GeV – roughly ∼ 10 - 11 s after the big bang. During this event, the fermions gained mass and the electric force separated from the weak force. There is currently no established explanation, however, for the apparent uniformity of the vacuum expectation value of the Higgs field which, like the uniformity in T, gives rise to its own horizon problem in standard ΛCDM cosmology. We show in this paper that a solution to the electroweak horizon problem may be found in the choice of cosmological model, and demonstrate that this issue does not exist in the alternative Friedmann–Robertson–Walker cosmology known as the Rh= ct universe.",
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