Article
Physics, Particles & Fields
Nikhil Raghuram, Washington Taylor, Andrew P. Turner
Summary: In many F-theory models, tuning specific gauge groups and matter content can lead to an automatic enhancement to a larger gauge group and matter content under certain circumstances. This principle applies to a variety of models including non-Higgsable gauge factors, nonabelian gauge factors, abelian gauge factors, and exotic matter. Tuning an F-theory model with the desired features may result in an enhancement or inconsistency, typically when the associated anomaly coefficient becomes too large.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Finn Bjarne Kohl, Magdalena Larfors, Paul-Konstantin Oehlmann
Summary: The paper focuses on studying F-theory on symmetric toroidal orbifolds that have roto-translations. These geometric shapes have various effects, including twisted affine folded fibers and multiple fibers, resulting in three distinct torus-fibrations for M/F-theory lifts. The study also discovers that these theories have a rich set of p=0,1,2 discrete p-form gauge symmetries, which match the Hodge numbers computed using heterotic world sheet techniques.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Riccardo D'Auria, Lucrezia Ravera
Summary: This paper presents a gauge theory of the conformal group in four spacetime dimensions with a nonvanishing torsion, revealing some preliminary results. Additionally, it is found that in the context of conformal supergravity, constraints imposed in the spacetime approach are consequences of the closure of the Bianchi identities.
Article
Physics, Particles & Fields
Yuta Hamada, Cumrun Vafa
Summary: By studying consistency conditions on worldvolume theory of 3-brane probes, we strengthen Swampland constraints on 8d supergravity theories, leading to strict restrictions on compact internal geometry, gauge algebra, and higher derivative terms. These results provide further evidence for the string lamppost principle in 8d with 16 supercharges.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Giorgos Anastasiou, Ignacio J. Araya, Mairym Busnego-Barrientos, Cristobal Corral, Nelson Merino
Summary: We investigate a conformally coupled scalar-tensor theory with a quartic potential and local conformal symmetry. By restoring the full local conformal symmetry, we determine the counterterms that make the on-shell action finite. The resulting action contains a conformally covariant tensor constructed from the metric and scalar field, which has the same conformal weight as the Weyl tensor. Adding conformal gravity and the Einstein-AdS action to the theory, we find that the action can still be renormalized even with broken conformal symmetry.
Article
Physics, Particles & Fields
David R. Morrison, Washington Taylor
Summary: This study shows that charge completeness in 6D supergravity theories with an F-theory description is related to the Mordell-Weil group, and this equivalence holds for 4D F-theory constructions as well. In many 6D F-theory models, the full charge lattice of the theory is generated by massless charged states.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Multidisciplinary
M. Sharif, Tayyab Naseer
Summary: This paper aims to extend the definition of complexity for a self-gravitating system in f (R, T) theory. By studying a static sphere and the corresponding modified field equations, it is found that the complexity factor YTF plays a key role in determining the structural complexity. Additional constraints are required to close the system due to the extra degrees of freedom in the field equations. Different models are analyzed and it is concluded that stable behavior is exhibited by the solutions for specific values of the model parameter.
Article
Physics, Multidisciplinary
Nikita Nekrasov, Nicolo Piazzalunga, Maxim Zabzine, Michele Vergne
Summary: We study the dynamics of supersymmetric theories in five dimensions obtained by compactifications of M-theory on a Calabi-Yau threefold X. The effective couplings of vector multiplets are determined by the geometry of X, particularly the Kahler class dependence of the volume of X when it is compact. Rigid supersymmetry emerges in the limit of divergent volume, and we investigate the structure of DuistermaatHeckman formula and its generalizations for non-compact toric Kahler manifolds. Equivariant volumes and their quantum versions are analyzed using finite-difference equations, and a physical application in seven-dimensional gauge theories is discussed.
Article
Astronomy & Astrophysics
F. S. Gama, R. Maluf, J. R. Nascimento, A. Yu Petrov, P. Porfirio
Summary: Using the superfield formalism and the master action approach, this paper proves the dual equivalence between four-dimensional supersymmetric self-dual and topologically massive models coupled to dynamical matter, at both classical and quantum levels.
Article
Astronomy & Astrophysics
Ida M. Rasulian, Mahdi Torabian, Liliana Velasco-Sevilla
Summary: Research has shown that a toy de Sitter no-scale supergravity model can be consistent with the refined de Sitter conjecture and the trans-Planckian censorship conjecture for specific parameter choices, and by adding rolling dynamics, the theory can become stable along the imaginary direction. Extending the model to multifield rolling and de Sitter fields has revealed the parameter space where they can be compatible with the refined de Sitter conjecture.
Article
Astronomy & Astrophysics
Edvard T. Musaev
Summary: In this work, the authors generalize the procedure of non-abelian T-duality to 11-dimensional backgrounds and find that it can provide supergravity solutions for the SL(5) exceptional Drinfeld algebra only when the isometry algebra of the sigma-model target space decomposes into a direct sum.
Article
Astronomy & Astrophysics
Mirjam Cvetic, Ling Lin, Andrew P. Turner
Summary: This article argues for the quantum-gravitational inconsistency of certain 6D N = (1, 0) supergravity theories and explains why the majority of these theories are not compatible with quantum gravity constraints using flavor symmetries. It also discusses how the automatic enhancement to a larger gauge sector remedies this inconsistency.
Article
Astronomy & Astrophysics
Jonathan J. Heckman, Craig Lawrie, Thomas B. Rochais, Hao Y. Zhang, Gianluca Zoccarato
Summary: This paper presents a general procedure for determining the flavor symmetry experienced by D3-branes probing 7-branes in the presence of S-folds, showing a relationship between S-fold generalization of orientifold projection and 4D flavor symmetry algebra, as well as providing insights into how to define F-theory in the presence of S-folds with discrete torsion.
Article
Astronomy & Astrophysics
Markus Dierigl, Jonathan J. Heckman
Summary: The study explores the cobordism conjecture regarding the triviality of the bordism group of quantum gravity, predicting the presence of D7-branes in type IIB string theory on a compactified circle. The non-Abelian structure of the IIB duality group SL(2, Z) implies the existence of additional 7-branes, with this information captured by closed paths on the moduli space of elliptic curves. By combining this conjecture with the Swampland conjecture, predictions are made for the allowed Mordell-Weil torsion groups in 8D F-theory vacua.
Article
Physics, Particles & Fields
Seung-Joo Lee, Timo Weigand
Summary: Motivated by the Swampland Distance and the Emergent String Conjecture, this paper analyzes the infinite distance degenerations in the complex structure moduli space of elliptic K3 surfaces. The classification and characterization of Weierstrass models associated with Type II and Type III Kulikov models for elliptic K3 surfaces are presented. The relationship between infinite distance limits and degenerations of Weierstrass models is explored. The results provide the basis for the classification of the infinite distance limits of elliptic K3 surfaces using F-theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
