Superpotentials From Stringy Instantons Without Orientifolds

Christoffer Petersson

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Superpotentials From Stringy Instantons Without Orientifolds

Christoffer Petersson

High Energy Physics - Theory · Submitted 12 Nov 2007

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim In this paper we show that it is possible to derive non-perturbative superpotential terms from a stringy instanton without introducing orientifold planes.

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What the abstract itself states, as probabilities: claims first 0.06 · states limitation 0.25 · human participants 0.01 · controlled comparison 0.02 · randomized assignment 0.01 · states quantitative result 0.05 · compares with prior results 0.39 · mentions code or data availability 0.02.

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arXiv listing abstract v2. Results and the main claim are underlined; show every role.

In this paper we show that it is possible to derive non-perturbative superpotential terms from a stringy instanton without introducing orientifold planes. The instanton is realized by a Euclidean D brane wrapping a non-trivial cycle upon which we also wrap a single space-filling D brane. The standard problem of unwanted neutral fermionic zero modes is evaded by the appearance of couplings to charged bosonic zero modes in the instanton moduli action. Since the Euclidean D brane wraps a cycle which is not associated to any low energy gauge dynamics, it can not be interpreted as an ordinary gauge instanton, but rather as a stringy one. By considering such a brane configuration at an orbifold singularity, we can explicitly evaluate the instanton moduli space integral and find a holomorphic superpotential term with the structure of a baryonic mass term.

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#	sentence	role	the authors' own work	states the main conclusion	strength
s0	In this paper we show that it is possible to derive non-perturbative superpotential terms from a stringy instanton without introducing orientifold planes.	contribution 0.60	0.95	0.95	asserted 0.72
s1	The instanton is realized by a Euclidean D brane wrapping a non-trivial cycle upon which we also wrap a single space-filling D brane.	method 0.82	0.71	0.05	asserted 1.00
s2	The standard problem of unwanted neutral fermionic zero modes is evaded by the appearance of couplings to charged bosonic zero modes in the instanton moduli action.	method 0.45	0.70	0.06	asserted 1.00
s3	Since the Euclidean D brane wraps a cycle which is not associated to any low energy gauge dynamics, it can not be interpreted as an ordinary gauge instanton, but rather as a stringy one.	interpretation 0.99	0.42	0.06	asserted 1.00
s4	By considering such a brane configuration at an orbifold singularity, we can explicitly evaluate the instanton moduli space integral and find a holomorphic superpotential term with the structure of a baryonic mass term.	result 0.96	0.95	0.25	asserted 1.00

What kind of paper the classifier reports this is: theoretical result 1.00 · evidence from proof or derivation 0.99.

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Original abstract

In this paper we show that it is possible to derive non-perturbative superpotential terms from a stringy instanton without introducing orientifold planes. The instanton is realized by a Euclidean D brane wrapping a non-trivial cycle upon which we also wrap a single space-filling D brane. The standard problem of unwanted neutral fermionic zero modes is evaded by the appearance of couplings to charged bosonic zero modes in the instanton moduli action. Since the Euclidean D brane wraps a cycle which is not associated to any low energy gauge dynamics, it can not be interpreted as an ordinary gauge instanton, but rather as a stringy one. By considering such a brane configuration at an orbifold singularity, we can explicitly evaluate the instanton moduli space integral and find a holomorphic superpotential term with the structure of a baryonic mass term.

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References

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

Testing F-theory GUTs with the Axiverse
hep-th 2026-06 unverdicted novelty 6.0 of 10

In F-theory GUTs, non-universal ALPs induced by hypercharge flux satisfy g_aγ/m_a well below the QCD axion prediction when gauge couplings unify near the string scale.
Supersymmetric Protection and the Swampland
hep-th 2020-03 conditional novelty 6.0 of 10

Exact vanishing of supersymmetric protected quantities in quantum gravity occurs only when the theory is an orbifold of a higher-supersymmetry theory, motivating a new Swampland conjecture.
Moduli Stabilisation versus Chirality for MSSM like Type IIB Orientifolds
hep-th 2007-11 conditional novelty 6.0 of 10

A chiral D-brane sector cannot be added after moduli are stabilised, because it induces a D-term potential and charged instanton zero modes; only combined F- and D-term stabilisation works, demonstrated on one swiss-c...
D-brane Instantons in Type II String Theory
hep-th 2009-02 accept novelty 2.0 of 10

D-brane instantons provide a calculable, zero-mode-driven source of non-perturbative superpotential and other holomorphic couplings in N=1 Type II orientifold compactifications.

How the literature uses it

45 arXiv papers cite this in 83 sentences

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Papers citing it · 65 sentences without a confident label

Builds on it 2 papers

We now show that the direct instanton analysis of [ref] for massive $U(1)$ nodes extends to the more general D-brane configurations studied in this paper.

Stringy Instantons in IIB Brane Systems · Wrapping a Massive U(1) Node · 1.00
Along these lines, we present a slight generalization of the discussion of [ref] in subsection [ref] which shows in quite concrete terms how superpotential terms can arise in this case.

Instantons and SUSY breaking in F-theory · D3-Instantons – Generalities · 0.98

Uses its method or tool 1 paper

As for the fermionic integration W_inst ∼∫d λ^α̇ dμ̅_AA dμ_AA ∏_b,c (d μ̅_Ab)^N_b (dμ_cA)^N_c e^-S_inst the integral on $λ^α̇$ can be performed as in [ref] using the $S_1$ part of the instanton action and it gives the ADHM fermionic constraints.

Stringy Instantons as Strong Dynamics · Stringy instanton contribution · 0.97

Compares with it 3 papers

In this appendix we show that there is no disagreement between the stringy instanton contributions of [ref] and our results.

Stringy Instantons as Strong Dynamics · Relation with known models · 0.97
These instantons are analogous to the ones discussed in [ref] , with the extra fermionic zero modes being lifted by couplings involving the D5-branes[$𝒩=2$ gauge instantons in String Theory orbifolds have been also extensively discussed in [ref] .].

Multi-instanton and string loop corrections in toroidal orbifold models · $E1$ instantons · 0.81
This is in contrast with the recently found instanton generated superpotentials in orientifold braneworlds [ref] coming from $λ$-like fermionic zero modes appearing in the two-dimensional ED1-gauge theory only in the odd-spin structure.

Unoriented D-brane Instantons vs Heterotic worldsheet Instantons · $T^4$-case · 0.96

Cites it as support 1 paper

As it turns out some multi-instantons[ [ref] ] can in fact generate superpotential [ref] .

Multi-Instanton Corrections to Superpotentials in Type II Compactifications · Introduction · 0.96

Cites it as background 10 papers

Recently, also space-time instantons have been studied more concretely [ref] .

Power Towers of String Instantons for N=1 Vacua · Introduction · 0.96
There are some works in the literature that study the stringy instanton effects in the low-energy effective actions (see e.g. [ref] ) and some of their applications from the phenomenological point of view [ref] .

Gauge-Stringy Instantons in N=2 U(N) Gauge Theories · Introduction · 1.00
Various applications of these novel non-perturbative effects in different branches of the string landscape have appeared [ref] [For two reviews on the subject of novel stringy instanton effects see [ref] .

Stringy Instantons and Yukawa Couplings in MSSM-like Orientifold Models · Introduction · 0.89

What it cites · 57 sentences without a confident label

Uses the method or tool of 1 paper

In order to recover the standard ADHM result for an ordinary gauge instanton we take the “ADHM limit”, implying that we, in addition to taking the field theory limit $α' →0$, perform a particular rescaling of the moduli fields, see [ref] , and then send $g_0 →∞$ while keeping the 4-dimensional D3 brane world volume gauge coupling fixed.

Classical gauge instantons from open strings · The Moduli Space Integral · 0.92

Compares with 7 papers

Note however that, in other configurations where orientifolds were used, it has been shown that the inclusion of such a baryonic mass term, in some instances, leads to dynamical supersymmetry breaking [ref] .

On the Geometry of Metastable Supersymmetry Breaking · Introduction · 0.86
Note however that, in other configurations where orientifolds were used, it has been shown that the inclusion of such a baryonic mass term, in some instances, leads to dynamical supersymmetry breaking [ref] .

Stringy Instantons and Cascading Quivers · Introduction · 0.86
Note however that, in other configurations where orientifolds were used, it has been shown that the inclusion of such a baryonic mass term, in some instances, leads to dynamical supersymmetry breaking [ref] .

Metastable vacua and D-branes at the conifold · Introduction · 0.86

Cites as background 17 papers

Non-perturbative superpotential terms which are known to be generated by a single instanton, such as the ADS superpotential in $𝒩$=1 SQCD for the case $N_f=N_c -1$, have been explicitly derived using boundary conformal field theory [ref] .

Non-perturbative SQCD Superpotentials from String Instantons · Introduction · 0.87
Non-perturbative superpotential terms which are known to be generated by a single instanton, such as the ADS superpotential in $𝒩$=1 SQCD for the case $N_f=N_c -1$, have been explicitly derived using boundary conformal field theory [ref] .

The Calculus of Many Instantons · Introduction · 0.87
Non-perturbative superpotential terms which are known to be generated by a single instanton, such as the ADS superpotential in $𝒩$=1 SQCD for the case $N_f=N_c -1$, have been explicitly derived using boundary conformal field theory [ref] .

New Instanton Effects In Supersymmetric QCD · Introduction · 0.87

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