26 Result(s)
within
James Halverson
Elementary Particles, Quantum Field Theory
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Article
Open AccessElectric-magnetic duality in a class of G2-compactifications of M-theory
We study electric-magnetic duality in compactifications of M-theory on twisted connected sum (TCS) G2 manifolds via duality with F-theory. Specifically, we study the physics of the D3-branes in F-theory compactif...
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Open Access6D anomaly-free matter spectrum in F-theory on singular spaces
In this paper we study the 6d localized charged matter spectrum of F-theory directly on a singular elliptic Calabi-Yau 3-fold, i.e. without smoothing via resolution or deformation of the entire fibration. Give...
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Open AccessGravitational waves from dark Yang-Mills sectors
Dark Yang-Mills sectors, which are ubiquitous in the string landscape, may be reheated above their critical temperature and subsequently go through a confining first-order phase transition that produces stocha...
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Open AccessBranes with brains: exploring string vacua with deep reinforcement learning
We propose deep reinforcement learning as a model-free method for exploring the landscape of string vacua. As a concrete application, we utilize an artificial intelligence agent known as an asynchronous advant...
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Open AccessEstimating Calabi-Yau hypersurface and triangulation counts with equation learners
We provide the first estimate of the number of fine, regular, star triangulations of the four-dimensional reflexive polytopes, as classified by Kreuzer and Skarke (KS). This provides an upper bound on the numb...
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Open AccessNon-simply-laced symmetry algebras in F-theory on singular spaces
We demonstrate how non-simply-laced gauge and flavor symmetries arise in F-theory on spaces with non-isolated singularities. The breaking from a simply-laced symmetry to one that is non-simply-laced is induced...
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Open AccessInfinitely many M2-instanton corrections to M-theory on G2-manifolds
We consider the non-perturbative superpotential for a class of four-dimensional N = ...
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Open AccessOn the scarcity of weak coupling in the string landscape
We study the geometric requirements on a threefold base for the corresponding F-theory compactification to admit a weakly-coupled type IIB limit. We examine both the standard Sen limit and a more restrictive l...
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Open AccessMachine learning in the string landscape
We utilize machine learning to study the string landscape. Deep data dives and conjecture generation are proposed as useful frameworks for utilizing machine learning in the landscape, and examples of each are ...
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Open AccessDualities of deformed \( \mathcal{N}=2 \) SCFTs from link monodromy on D3-brane states
We study D3-brane theories that are dually described as deformations of two different N ...
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Open AccessOn gauge enhancement and singular limits in G 2 compactifications of M-theory
We study the physics of singular limits of G 2 compactifications of M-theory, which are necessary to obtain a compactification with non-abelian gauge symmetry or massless charged p...
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Open Access\( {\mathrm{\mathbb{P}}}^1 \) -bundle bases and the prevalence of non-Higgsable structure in 4D F-theory models
We explore a large class of F-theory compactifications to four dimensions. We find evidence that gauge groups that cannot be Higgsed without breaking supersymmetry, often accompanied by associated matter field...
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Open AccessThe landscape of M-theory compactifications on seven-manifolds with G2 holonomy
We study the physics of globally consistent four-dimensional N ...
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Open AccessNon-Higgsable QCD and the standard model spectrum in F-theory
Many four-dimensional supersymmetric compactifications of F-theory contain gauge groups that cannot be spontaneously broken through geometric deformations. These “non-Higgsable clusters” include realizations o...
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Open AccessOn finiteness of type IIB compactifications: magnetized branes on elliptic Calabi-Yau threefolds
The string landscape satisfies interesting finiteness properties imposed by supersymmetry and string-theoretical consistency conditions. We study ...
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Matter from geometry without resolution
We utilize the deformation theory of algebraic singularities to study charged matter in compactifications of M-theory, F-theory, and type IIa string theory on ellipti- cally fibered Calabi-Yau manifolds. In F-...
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Article
New methods for characterizing phases of 2D supersymmetric gauge theories
We study the physics of two-dimensional \( \mathcal{N} \) = (2, 2) gauged linear sigma models (GLSMs) via the two-spher...
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Stringy hidden valleys
We study gauge theories where quasi-hidden sectors are added to the MSSM for the sake of string consistency conditions which would otherwise not be satisfied. We focus on quiver gauge theories motivated by wea...
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Ultraviolet completions of axigluon models and their phenomenological consequences
The CDF and D0 collaborations have observed a forward-backward asymmetry in \( t\overline{t} \) production at large inv...
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Article
On seven-brane dependent instanton prefactors in F-theory
We study the moduli-dependent prefactor of M5-instanton corrections to the superpotential in four-dimensional F-theory compactifications. In light of the M-theory and type IIb limits and also heterotic duality...
