REVIEW
Dynamical SUSY Breaking in Meta-Stable Vacua
High Energy Physics - Theory · Submitted 23 Feb 2006 · Published version · 37 references
Pith's verdict: A landmark paper that reframes dynamical SUSY breaking around metastable vacua, with a simple, mostly rigorous demonstration in massive SQCD; the central claim holds up even though the Kähler coefficients are order-one unknowns.
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Referee report
The paper
The paper claims
Supersymmetric QCD with massive flavors has long-lived, calculable metastable vacua that break supersymmetry dynamically.
The reading
What carries the argument
The rank-condition mechanism: for $N < N_f$, the F-term $F_{\Phi}^{ij} = h(\tilde{\phi}^c_j\,\phi^c_i - \mu^2\delta^{ij})$ cannot be set to zero because $\tilde{\phi}\phi$ has rank $N$ while $\mu^2\delta^{ij}$ has rank $N_f$. This mechanism is embedded in supersymmetric QCD through electric-magnetic duality: the magnetic dual is an infrared-free gauge theory, so the one-loop supertrace formula $V_{\rm eff}^{(1)} = \frac{1}{64\pi^2}\mathrm{STr}\,\mathcal{M}^4\log\mathcal{M}^2$ is reliable and stabilizes all pseudo-moduli. The same rank condition, with different group-theoretic coefficients, drives the analogous metastable constructions for SO($N_c$)/Spin($N_c$) and Sp($N_c$) theories. Nonperturbative gaugino condensation in the magnetic gauge group supplies the superpotential that restores supersymmetry elsewhere in field space, converting the local minimum into a metastable one.
Extended reading notes
Core claim
The central claim is that N=1 SU($N_c$) supersymmetric QCD with small, non-degenerate quark masses has a metastable, dynamically supersymmetry-breaking vacuum near $M = q = \tilde{q} = 0$, coexisting with the $N_c$ supersymmetric vacua required by the index theorem. The argument proceeds through the free-magnetic dual: in the infrared the theory becomes a tree-level supersymmetry-breaking model whose superpotential $W = h\,\mathrm{Tr}\,\phi\Phi\tilde{\phi} - h\mu^2\mathrm{Tr}\,\Phi$ has F-terms that cannot all vanish, because $\tilde{\phi}\phi$ has rank $N = N_f - N_c$ while $\mu^2$ has rank $N_f$. A one-loop effective potential stabilizes the classically flat pseudo-moduli with positive squared masses, while a nonperturbative superpotential from gaugino condensation creates supersymmetric vacua far away in field space, making the broken-supersymmetry vacuum only metastable. The vacuum energy, light spectrum, and lifetime are all computable in the magnetic description up to two order-one coefficients that encode the unknown Kähler metric.
Load-bearing premise
The argument assumes that the unknown Kähler metric of the magnetic dual near the origin is smooth and close to canonical, with positive coefficients of order one; if the true metric made any of the one-loop squared masses negative, the claimed non-supersymmetric minimum would be unstable or absent.
Editorial extensions
If this is right
- Model building for dynamical supersymmetry breaking no longer needs to avoid theories with supersymmetric vacua; the simplest non-chiral massive gauge theories automatically provide calculable metastable supersymmetry-breaking sectors.
- The lifetime is tunable: with $\epsilon \sim \sqrt{m/\Lambda}$, the bounce action grows like $\epsilon^{-4(N_f-3N)/(N_f-N)}$, so sufficiently small quark masses make the metastable vacuum live longer than the age of the universe.
- The same construction gives metastable broken-supersymmetry vacua in SO($N_c$)/Spin($N_c$) and Sp($N_c$) gauge theories; in the Spin($N$) case the supersymmetric and non-supersymmetric vacua sit in different phases, confining versus oblique confining.
- The metastable vacuum has a compact moduli space of Goldstone-boson vacua, whose larger configuration space compared with the isolated supersymmetric vacua may favor its population in early-universe cosmology.
- These theories sidestep the usual R-symmetry obstruction: the microscopic theory has no exact R-symmetry, while the magnetic dual develops an accidental R-symmetry near the origin, so broken supersymmetry coexists with the absence of an exact R-symmetry.
- The pseudo-moduli acquire small masses of order $h^2\mu$ and the Goldstino remains exactly massless, giving a distinctive low-energy spectrum that can be tested if such a sector mediates supersymmetry breaking.
Reading between the lines
- If the central claim survives a full determination of the magnetic Kähler metric, the same rank-condition logic can be transplanted to other dual pairs, such as adjoint-matter dualities, N=2 theories slightly broken to N=1, and string-realized quiver gauge theories, yielding a wide class of calculable metastable supersymmetry-breaking vacua.
- A lattice or holographic computation of the two unknown order-one coefficients in the Kähler potential would promote the existence proof into quantitative predictions for the pseudo-modulus masses and vacuum energy, which could be searched for in cosmological or collider signatures.
- Because the metastable vacuum manifold has nontrivial topology, solitonic strings are expected with lifetimes comparable to the vacuum lifetime; if this sector mediates supersymmetry breaking, those strings could have observable cosmological consequences.
- The larger volume of the broken-supersymmetry vacuum moduli space relative to the isolated supersymmetric vacua suggests a possible entropic bias toward initial conditions with broken supersymmetry in the string landscape, though quantifying such a bias requires a vacuum-selection measure that the paper does not provide.
Original abstract
Dynamical supersymmetry breaking in a long-lived meta-stable vacuum is a phenomenologically viable possibility. This relatively unexplored avenue leads to many new models of dynamical supersymmetry breaking. Here, we present a surprisingly simple class of models with meta-stable dynamical supersymmetry breaking: N=1 supersymmetric QCD, with massive flavors. Though these theories are strongly coupled, we definitively demonstrate the existence of meta-stable vacua by using the free-magnetic dual. Model building challenges, such as large flavor symmetries and the absence of an R-symmetry, are easily accommodated in these theories. Their simplicity also suggests that broken supersymmetry is generic in supersymmetric field theory and in the landscape of string vacua.
The compiled record
The paper's own sentences, arranged, kept beside the review and separate from it. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
The abstract, sentence by sentence
Dynamical supersymmetry breaking in a long-lived meta-stable vacuum is a phenomenologically viable possibility. This relatively unexplored avenue leads to many new models of dynamical supersymmetry breaking. Here, we present a surprisingly simple class of models with meta-stable dynamical supersymmetry breaking: N=1 supersymmetric QCD, with massive flavors. Though these theories are strongly coupled, we definitively demonstrate the existence of meta-stable vacua by using the free-magnetic dual. Model building challenges, such as large flavor symmetries and the absence of an R-symmetry, are easily accommodated in these theories. Their simplicity also suggests that broken supersymmetry is generic in supersymmetric field theory and in the landscape of string vacua.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Dynamical supersymmetry breaking in a long-lived meta-stable vacuum is a phenomenologically viable possibility. | background 1.00 | 0.06 | 0.18 | hedged possibility 0.79 |
| s1 | This relatively unexplored avenue leads to many new models of dynamical supersymmetry breaking. | gap 0.51 | 0.09 | 0.06 | asserted 0.99 |
| s2 | Here, we present a surprisingly simple class of models with meta-stable dynamical supersymmetry breaking: N=1 supersymmetric QCD, with massive flavors. | contribution 1.00 | 0.91 | 0.30 | asserted 1.00 |
| s3 | Though these theories are strongly coupled, we definitively demonstrate the existence of meta-stable vacua by using the free-magnetic dual. | result 0.44 | 0.94 | 0.37 | asserted 1.00 |
| s4 | Model building challenges, such as large flavor symmetries and the absence of an R-symmetry, are easily accommodated in these theories. | interpretation 0.49 | 0.48 | 0.05 | asserted 0.95 |
| s5 | Their simplicity also suggests that broken supersymmetry is generic in supersymmetric field theory and in the landscape of string vacua. | interpretation 1.00 | 0.23 | 0.39 | hedged possibility 0.99 |
What was examined, and what was not
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References
How later papers used it
242 later papers cite it
11 later papers by other authors are listed below: 7 used its method or tool, 3 used its data or values and 1 compared its own results with it.
Uses its method or tool 7 of 14 papers with this label
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Performed its expansion using the integral representation of this paper.
The Effective Kahler Potential, Metastable Vacua and R-Symmetry Breaking in O'Raifeartaigh Models (2010) · 1.00 · paraphrased: the licence does not allow quoting
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Evaluated the lifetime of the metastable ISS vacuum in the triangle approximation following this paper.
A light neutralino in hybrid models of supersymmetry breaking (2008) · 1.00 · paraphrased: the licence does not allow quoting
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Expanded around a point as done in this paper.
Meta-Stable Brane Configurations with Five NS5-Branes (2007) · 0.99 · paraphrased: the licence does not allow quoting
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Expanded these fields around a point as in this paper and arrived at the relevant superpotential up to quadratic order in the fluctuation.
More Meta-Stable Brane Configurations without D6-Branes (2007) · 0.97 · paraphrased: the licence does not allow quoting
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Expanded around a point as done in this paper.
Meta-Stable Brane Configuration of Product Gauge Groups (2007) · 0.96 · paraphrased: the licence does not allow quoting
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Performed, as in this paper, a calculation of the contributions to the one-loop Coleman-Weinberg potential of the heavy messenger fields.
A Hybrid Higgs (2010) · 0.96 · paraphrased: the licence does not allow quoting
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Used the so-called ISS model of this paper to uplift the AdS vacuum in the KL scenario via dynamical supersymmetry breaking.
Dark matter in the KL moduli stabilization scenario with SUSY breaking sector from $\mathcal{N}=1$ SQCD (2018) · 0.94 · paraphrased: the licence does not allow quoting
Uses its data or values 3 papers
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Used m_x^2, which has been calculated in this paper, in its analysis of the potential.
Supersymmetry breaking, R-symmetry, and conformal dynamics (2009) · 0.99 · paraphrased: the licence does not allow quoting
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Used m_x^2, which has been calculated in this paper, in its analysis of the potential.
Metastable supersymmetry breaking vacua from conformal dynamics (2007) · 0.98 · paraphrased: the licence does not allow quoting
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Used the value of b given in this paper in its result for V_CW.
Enhanced symmetry points and metastable supersymmetry breaking along pseudo-runaway directions (2007) · 0.84 · paraphrased: the licence does not allow quoting
Compares with it 1 of 17 papers with this label
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Found that its result matches the value given in this paper, which was found using the Coleman-Weinberg potential.
Supersymmetry breaking metastable vacua in runaway quiver gauge theories (2007) · 0.98 · paraphrased: the licence does not allow quoting
How the literature uses it
234 arXiv papers cite this in 579 sentences
Papers citing it · 371 sentences without a confident label
Builds on it 13 papers
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In this paper, we will discuss how the field theory model of [ref] , that is massive SQCD in the free magnetic range can be obtained on the seven-branes of F-theory.
Dynamically SUSY Breaking SQCD on F-Theory Seven-Branes · Introduction · 0.81
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Then it is natural to ask what happens for the dynamical supersymmetry breaking in meta-stable vacua, in the $N=1$ supersymmetric product gauge theories which have mass terms [ref] and quartic terms [ref] for the flavors in the electric superpotential, if one dualizes the whole two gauge groups, not a single gauge group.
Meta-Stable Brane Configurations by Dualizing the Two Gauge Groups · Introduction · 0.87
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This model was suggested in [ref] as an R-symmetry breaking deformation of the meta-stable SUSY breaking model of ISS [ref] .
Dark Matter and Pseudo-flat Directions in Weakly Coupled SUSY Breaking Sectors · A Metastable SUSY breaking sector · 0.86
Uses its method or tool 14 papers
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For this purpose, we use the so-called ISS model [ref] .
Dark matter in the KL moduli stabilization scenario with SUSY breaking sector from $\mathcal{N}=1$ SQCD · The ISS model · 0.94
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The expansion will be performed using the integral representation of ([ref]) [ref] : [equation] This formula is only valid in the limit $Λ→∞$, just as was ([ref]).
The Effective Kahler Potential, Metastable Vacua and R-Symmetry Breaking in O'Raifeartaigh Models · Setup · 1.00
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To see such a supersymmetric solution, following [ref] we decompose $ϕ, ϕ̃$ and $Φ$ as [equation] where $Y$, $χ$ and $χ̃$ are $N×N$ matrices, $X$ is an $(N_F-N)×(N_F-N)$ matrix, $Z$, $Z̃$, $ρ$ and $ρ̃$ are $(N_F-N)×N$ matrices.
Metastable supersymmetry breaking vacua from conformal dynamics · 4D conformal model · 0.95
Uses its data or values 3 papers
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Hence, we analyze the potential, $V= V_SUSY + m_x^2|x̂|^2$, and we use $m_x^2$, which has been calculated in [ref] , i.e. [equation] Note that $m_x^2$ is suppressed toward the IR region like $f̂$.
Metastable supersymmetry breaking vacua from conformal dynamics · 4D conformal model · 0.98
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Hence, we analyze the potential, $V= V_SUSY + m_x^2|x̂|^2$, and we use $m_x^2$, which has been calculated in [ref] , i.e. [equation] Note that $m_x^2$ is suppressed toward the IR region like $f̂$.
Supersymmetry breaking, R-symmetry, and conformal dynamics · 4D conformal model · 0.99
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The result is V_CW=N_c bh^3 m |ϕ| |X|^2+…with $b$=$(log4-1)/8π^2 Ñ_c$ [ref] , and `$…$' represent contributions that are unimportant for the present discussion.
Enhanced symmetry points and metastable supersymmetry breaking along pseudo-runaway directions · Metastability near enhanced symmetry points · 0.84
Compares with it 17 papers
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The superpotential for this quiver gauge theory is isssu W=h ζ ( Φ) - h ( ΦYY) , which is the same as the ISS superpotential in the IR limit [ref] , with the $SU(N)$ identified as the “color” group and $SU(N+M)$ as the “flavor” symmetry.
On the Geometry of Metastable Supersymmetry Breaking · Dynamical SUSY breaking · 0.91
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The leading decay channel can be arranged to be as in [ref] with bounce action [ref] :[ To argue this note that there are only two ways in which the leading decay channel could differ from that found in [ref] .
Metastable Vacua in Warped Throats at Non-Isolated Singularities · Infrared model · 0.83
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In the magnetic theory that we consider, the number of colors is $N_f - N_c$ and the number of massive flavors is $N_f$ so the SUSY is broken by the rank condition the SUSY in broken by the rank condition i.e. the F-term equation for the field $Φ̃$ does not have a solution, same as in [ref] .
Metastable Vacua and Complex Deformations · $N =1, SU(N_f) ×SU(N_c)$ Model · 0.88
Cites it as support 5 papers
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However, it has been shown in Ref. [ref] that the vacuum near $S=0$ is meta-stable.
Sweet Spot Supersymmetry · UV completion · 0.97
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Remarkably, this is precisely what happens in the Intriligator, Seiberg and Shih (ISS) model [ref] .
Direct Mediation, Duality and Unification · Introduction · 0.96
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In particular, they discussed the ISS model [ref] , which describes a BREAK sector with a single $U(1)$ gauge field at low energies.
Is Gauge Mediation in the Swampland? · Mediation of SUSY Breaking · 0.97
Cites it as background 103 papers
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Recently ISS [ref] have proposed that supersymmetry breaking could occur in a long-lived metastable state.
SQCD Inflation & SUSY Breaking · Conclusions · 0.85
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This section closely reviews [ref] and sets our notation.
Direct Mediation and Metastable Supersymmetry Breaking for SO(10) · Seiberg dual pictures for SO(N) SQCD · 0.87
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However, we will simplify our model and concentrate on the theory of [ref] reviewed in the previous subsection.
Dynamically SUSY Breaking SQCD on F-Theory Seven-Branes · The Spectrum Localized on the Surfaces · 0.86
Discussion
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