Phase of confined electroweak force in the early Universe

Berger, Joshua; Long, Andrew J.; Turner, Jessica

doi:10.1103/physrevd.100.055005

Cited by 7 publications

(13 citation statements)

References 68 publications

(105 reference statements)

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“…As we started to write this paper, we became aware of the [31] by Berger, Long and Turner which asks essentially the same questions, motivated by early universe baryogenesis. Our results largely agree where there is overlap.…”

Section: Note Addedmentioning

confidence: 99%

If the weak were strong and the strong were weak

Lohitsiri

Tong

2019

SciPost Phys.

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We explore the phase structure of the Standard Model as the relative strengths of the SU (2) weak force and SU (3) strong force are varied. With a single generation of fermions, the structure of chiral symmetry breaking suggests that there is no phase transition as we interpolate between the SU (3)-confining phase and the SU (2)-confining phase. Remarkably, the massless left-handed neutrino, familiar in our world, morphs smoothly into a massless right-handed down-quark. With multiple generations, a similar metamorphosis occurs, but now proceeding via a phase transition.In the second half of the paper we introduce a two-parameter extension of the Standard Model, a chiral gauge theory with gauge group U (1) × Sp(r) × SU (N ). We again explore the phase structure of the theory as the relative strengths of the Sp(r) and SU (N ) gauge couplings vary.

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Section: Note Addedmentioning

confidence: 99%

If the weak were strong and the strong were weak

Lohitsiri

Tong

2019

SciPost Phys.

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“…This article explores a non-standard cosmology that can dramatically change the favored mass range for an SU(2) L -charged WIMP, which makes up the bulk of the dark matter. We introduce dynamics that modify the value of the SU(2) L interaction strength very early, causing it to confine [12]. This weak confinement causes the left-chiral quarks and leptons of the SM, and a new vector-like pair of fermionic doublets that plays the role of dark matter, to bind into composite pion-like states that are SU(2) L neutral.…”

Section: Jhep02(2022)047mentioning

confidence: 99%

Dark matter freeze-out during SU(2)L confinement

Howard

Ipek

Tait

et al. 2022

J. High Energ. Phys.

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We explore the possibility that dark matter is a pair of vector-like fermionic SU(2)L doublets and propose a novel mechanism of dark matter production that proceeds through the confinement of the weak sector of the Standard Model. This confinement phase causes the Standard Model doublets and dark matter to confine into pions. The dark pions freeze-out before the weak sector deconfines and generate a relic abundance of dark matter. We solve the Boltzmann equations for this scenario to determine the scale of confinement and constituent dark matter mass required to produce the observed relic density. We determine which regions of this parameter space evade direct detection, collider bounds, and successfully produce the observed relic density of dark matter. For a TeV scale pair of vector-like fermionic SU(2)L doublets, we find the weak confinement scale to be ∼ 700 TeV.

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“…Following Ref. [12], we define M 2 Π in the basis Π = {η , Π a } where a = 1...14. In contrast to the case studied in [12], the resulting mass matrix contains non-diagonal entries mixing the η with the meson dominantly composed of χ 1 χ 2 :…”

Section: Pion Masses and Mass Eigenstatesmentioning

confidence: 99%

“…We examine two benchmark cases: BP1 where g s , g and s Q = g / 3g 2 s + g 2 are found by evaluating the running SM coupling constants to approximately Λ W and BP2, which is similar to a regime of interest from Ref. [12]. More specifically:…”

Section: Pion Masses and Mass Eigenstatesmentioning

confidence: 99%

Dark Matter Freeze-out during $\mathrm{SU}(2)_{\rm L}$ Confinement

Howard,

Ipek,

Tait

et al. 2021

Preprint

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We explore the possibility that dark matter is a pair of vector-like fermionic SU(2) L doublets and propose a novel mechanism of dark matter production that proceeds through the confinement of the weak sector of the Standard Model. This confinement phase causes the Standard Model doublets and dark matter to confine into pions. The dark pions freeze-out before the weak sector deconfines and generate a relic abundance of dark matter. We solve the Boltzmann equations for this scenario to determine the scale of confinement and constituent dark matter mass required to produce the observed relic density. We determine which regions of this parameter space evade direct detection, collider bounds, and successfully produce the observed relic density of dark matter. For a TeV scale pair of vector-like fermionic SU(2) L doublets, we find the weak confinement scale to be ∼ 700 TeV.

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Phase of confined electroweak force in the early Universe

Cited by 7 publications

References 68 publications

If the weak were strong and the strong were weak

If the weak were strong and the strong were weak

Dark matter freeze-out during SU(2)L confinement

Dark Matter Freeze-out during $\mathrm{SU}(2)_{\rm L}$ Confinement

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