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Metastable Cosmic Strings in Realistic Models
High Energy Physics - Phenomenology · Submitted 25 Aug 1992
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We then consider phenomenologically viable models based on the gauge group $SU(2)_L \times SU(2)_R \times U(1)_{B-L}$ and show that metastable strings exist and are stable to small perturbations for a large region of the parameter space for these models.
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The abstract, sentence by sentence
We investigate the stability of the electroweak Z-string at high temperatures. Our results show that while finite temperature corrections can improve the stability of the Z-string, their effect is not strong enough to stabilize the Z-string in the standard electroweak model. Consequently, the Z-string will be unstable even under the conditions present during the electroweak phase transition. We then consider phenomenologically viable models based on the gauge group $SU(2)_L \times SU(2)_R \times U(1)_{B-L}$ and show that metastable strings exist and are stable to small perturbations for a large region of the parameter space for these models. We also show that these strings are superconducting with bosonic charge carriers. The string superconductivity may be able to stabilize segments and loops against dynamical contraction. Possible implications of these strings for cosmology are discussed.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We investigate the stability of the electroweak Z-string at high temperatures. | contribution 0.98 | 0.87 | 0.03 | unclear 0.60 |
| s1 | Our results show that while finite temperature corrections can improve the stability of the Z-string, their effect is not strong enough to stabilize the Z-string in the standard electroweak model. | result 1.00 | 0.94 | 0.29 | asserted 1.00 |
| s2 | Consequently, the Z-string will be unstable even under the conditions present during the electroweak phase transition. | result 0.66 | 0.81 | 0.26 | asserted 1.00 |
| s3 | We then consider phenomenologically viable models based on the gauge group $SU(2)_L \times SU(2)_R \times U(1)_{B-L}$ and show that metastable strings exist and are stable to small perturbations for a large region of the parameter space for these models. | result 0.76 | 0.96 | 0.47 | asserted 1.00 |
| s4 | We also show that these strings are superconducting with bosonic charge carriers. | result 0.99 | 0.93 | 0.07 | asserted 1.00 |
| s5 | The string superconductivity may be able to stabilize segments and loops against dynamical contraction. | interpretation 0.98 | 0.32 | 0.07 | hedged possibility 1.00 |
| s6 | Possible implications of these strings for cosmology are discussed. | interpretation 0.73 | 0.58 | 0.04 | unclear 0.65 |
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The paper
Original abstract
We investigate the stability of the electroweak Z-string at high temperatures. Our results show that while finite temperature corrections can improve the stability of the Z-string, their effect is not strong enough to stabilize the Z-string in the standard electroweak model. Consequently, the Z-string will be unstable even under the conditions present during the electroweak phase transition. We then consider phenomenologically viable models based on the gauge group $SU(2)_L \times SU(2)_R \times U(1)_{B-L}$ and show that metastable strings exist and are stable to small perturbations for a large region of the parameter space for these models. We also show that these strings are superconducting with bosonic charge carriers. The string superconductivity may be able to stabilize segments and loops against dynamical contraction. Possible implications of these strings for cosmology are discussed.
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References
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5 arXiv papers cite this in 8 sentences
Papers citing it · 4 sentences without a confident label
Compares with it 1 paper
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Therefore the vortex molecule is stable for a much wider parameter range compared to the usual axially symmetric non-topological $Z$ strings studied in Refs. [ref] .
Stable $Z$-strings with topological polarization in two Higgs doublet model · Introduction · 0.96
Cites it as background 3 papers
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The classical stability of the embedded string is not guaranteed by the topological features of the moduli space, and it has been studied for the Z-string in the breaking $SU(2)_L×U(1)_Y→U(1)_Q$ by analytically and numerically since 1990s [ref] , but few for other symmetry breaking [ref] .
Stability of the embedded string in the $SU(N)\times U(1)$ Higgs model and its application · discussion and summary · 0.93
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The corresponding question has been studied in the Standard Model and in left–right extensions in Ref. [ref] .
Thermal Metastable Strings in One-Scale Models and Gravitational Waves · Results and Discussion · 0.80
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To stabilize it, various mechanisms have been proposed thus far, for instance, thermal effect [ref] , fermions trapped around the $Z$-strings [ref] , and external magnetic fields [ref] (see also Refs. [ref] ).
Stable $Z$-strings with topological polarization in two Higgs doublet model · Introduction · 0.81
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