Article
Physics, Multidisciplinary
D. Farotti, J. B. Gutowski
Summary: This article classifies warped dS(5) backgrounds in D = 11 supergravity with enhanced supersymmetry. The backgrounds preserving different supersymmetries are studied and the corresponding conclusions are given.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Physics, Particles & Fields
Alessio Marrani, Anshul Mishra, Prasanta K. Tripathy
Summary: This study focuses on extremal solutions in M-theory compactifications, particularly non-BPS attractors and their relevance to the Weak Gravity Conjecture (WGC). The research explores the explicit expressions and properties of attractor moduli for BPS and non-BPS solutions, as well as calculates black hole entropy and black string tension. The uniqueness of BPS black hole attractors is confirmed, and multiple non-BPS black string attractors are discovered. Additionally, stability analyses are conducted, revealing the stability of non-BPS black strings.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Naomi Gendler, Irene Valenzuela
Summary: The text discusses the charge-to-mass structure of BPS states in N = 2 compactifications of Type IIB string theory on Calabi-Yau three-folds and its implications for the Swampland Conjectures in the presence of multiple gauge and scalar fields. It shows that in infinite distance limits, the BPS bound coincides with the black hole extremality bound and the charge-to-mass vectors of the BPS states lie on degenerate ellipsoids with only two non-degenerate directions. It provides general bounds on the mass decay rate of the tower of states in terms of the black hole extremality bound, implying lambda >= 1/6.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Praxitelis Ntokos, Ioannis Papadimitriou
Summary: In this study, an effective superpotential formalism was developed for the SU(2)xU(1) invariant sector of N = 2 gauged supergravity in five dimensions, providing the exact superpotential for all 1/4 BPS solutions in this sector. By utilizing the superpotential, the thermodynamics, conserved charges, and supersymmetry properties of the solutions were analyzed, leading to the discovery of a unifying entropy extremization principle. The study also demonstrated the first law for black holes in this sector and confirmed the generalized BPS relation derived from supersymmetric solutions.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Dmitri Alekseevsky, Alessio Marrani, Andrea Spiro
Summary: This paper investigates BPS extremal black holes in ungauged N = 2 D = 4 supergravity theories and finds an expression for their entropy that depends only on electric and magnetic charges, applicable in models with homogeneous scalar manifolds.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Carla Henriquez-Baez, Marcela Lagos, Aldo Vera
Summary: In this study, analytical solutions describing black holes and black strings in the Einstein SU(N)-nonlinear sigma model were constructed using the embedding ansatz and parametrization methods. These configurations not only satisfy the model equations but also demonstrate the impact of the flavor number on the geometry and thermodynamics.
Article
Physics, Particles & Fields
Andres Anabalon, Dumitru Astefanesei, Antonio Gallerati, Mario Trigiante
Summary: This article investigates a family of four-dimensional, N = 2 supergravity theories that interpolate between single dilaton truncations of the SO(8) gauged N = 8 supergravity. The study includes constructing non-extremal black hole solutions and their supersymmetric limits, as well as analyzing their effects on the dual theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
David Berenstein, Shannon Wang
Summary: In this paper, we introduce coherent states averaged over a gauge group action to study correlators of half BPS states in N = 4 SYM theory. We show that the overlaps of these averaged coherent states can be written in terms of the HCIZ integral and are a generating function of correlators. We also discuss the computation of normalization of two point functions and the addition of open strings to this formulation.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
K. C. Matthew Cheung, Rahim Leung
Summary: By constructing consistent Kaluza-Klein truncations of IIA supergravity, we obtained two gauged supergravity theories in D = 5 and D = 4, coupled to three vector multiplets and one vector multiplet with two hypermultiplets respectively, with scalar manifolds and gauge groups depending on the characteristics of Sigma(2) and Sigma(3). By performing Inonu-Wigner contractions on the 5 and 4-dimensional gauged supergravity theories, we directly obtained the results of these truncations.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Bert van Geemen, Alessio Marrani, Francesco Russo
Summary: The study focuses on Bekenstein-Hawking entropy and attractors in extremal BPS black holes of N = 2, D = 4 ungauged supergravity, which are obtained from the reduction of minimal, matter-coupled D = 5 supergravity. The research provides explicit expressions for the BPS black hole entropy and attractors by formulating and proving an invertibility condition for the gradient map of the corresponding cubic form, under certain assumptions. Examples with specific parameters are presented to illustrate the findings, along with brief comments on Kleinian signatures and split algebras.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Pierre Heidmann
Summary: A non-BPS linear ansatz is derived using the charged Weyl formalism in string and M-theory backgrounds. The ansatz describes static and axially-symmetric solutions with an arbitrary number of non-BPS sources, corresponding to various brane, momentum, and KKm charges. Several families of solutions, such as chains of black holes and smooth bubbling geometries, are constructed and their physics is studied.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Madhu Mishra, Amitabh Virmani
Summary: We develop the thermodynamics of BPS and near-BPS AdS(6) black holes and study their phase diagram in the grand canonical ensemble. We highlight two distinct deformations orthogonal to the BPS surface and show that the considerations of the BPS entropy function can be extended to describe the near-BPS regime. The excess entropy and changes in all potentials are perfectly accounted for via the extremization principle.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Palash Dubey, Chethan N. Gowdigere
Summary: This study focuses on gravitini zero modes in four-dimensional N = 2 pure supergravity theory, analyzing their solutions to the Rarita-Schwinger equations. By reducing these equations to linear coupled partial differential equations on R-3, the study reveals the emergence of gravitini zero modes due to broken supersymmetries, along with other solutions characterized by four integration constants, including extra fermion zero modes. Further analysis indicates the presence of four independent extra zero modes in pure gauge solutions.
Article
Physics, Particles & Fields
Fabrizio Canfora, Julio Oliva, Marcelo Oyarzo
Summary: In this paper, we revisit the problem of finding BPS solutions in N = 4 SU (2) x SU (2) gauged supergravity. We report a new supersymmetric solution in the Abelian sector and a new solution whose supersymmetric nature was overlooked in the previous literature. Moving to the non-Abelian sector, we construct electric-meronic and double-meron solutions, which lead to singular 1/4 BPS configurations. We also modify the self-interaction of the scalar and construct exact black holes with interesting causal structures and asymptotic behavior.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Mathematical
Cody Long, Artan Sheshmani, Cumrun Vafa, Shing-Tung Yau
Summary: We study extremal non-BPS black holes and strings arising in M-theory compactifications on Calabi-Yau threefolds, obtained by wrapping M2 branes on nonholomorphic 2-cycles and M5 branes on non-holomorphic 4-cycles. Using the attractor mechanism, we compute the black hole mass and black string tension, leading to a conjectural formula for the asymptotic volumes of connected, locally volume-minimizing representatives of non-holomorphic, even-dimensional homology classes in the threefold, without knowledge of an explicit metric. In the case of divisors, we find examples where the volume of the representative corresponding to the black string is less than the volume of the minimal piecewise-holomorphic representative, predicting recombination for those homology classes and leading to stable, non-BPS strings. We also compute the central charges of non-BPS strings in F-theory via a near-horizon Ad S-3 limit in 6d which, upon compactification on a circle, account for the asymptotic entropy of extremal nonsupersymmetric 5d black holes (i.e., the asymptotic count of non-holomorphic minimal 2-cycles).
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2023)
Article
Physics, Particles & Fields
Kiril Hristov, Stefanos Katmadas, Chiara Toldo
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Seyed Morteza Hosseini, Kiril Hristov, Alberto Zaffaroni
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Kiril Hristov, Ivano Lodato, Valentin Reys
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Multidisciplinary
Nikolay Bobev, Anthony M. Charles, Kiril Hristov, Valentin Reys
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Particles & Fields
Seyed Morteza Hosseini, Kiril Hristov, Yuji Tachikawa, Alberto Zaffaroni
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Particles & Fields
Seyed Morteza Hosseini, Kiril Hristov
Summary: The study discusses the reduction of 6d matter-coupled F(4) supergravity on a compact Riemann surface Sigma g, resulting in an N = 2 gauged supergravity model. Static dyonic black holes in AdS(6) were successfully constructed, and new solutions for the 4d theory were discovered.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Nikolay Bobev, Anthony M. Charles, Dongmin Gang, Kiril Hristov, Valentin Reys
Summary: This study investigates the interplay between four-derivative 4d gauged supergravity, holography, wrapped M5-branes, and theories of class R. By using results from Chern-Simons theory and the 3d-3d correspondence, the study constrains the coefficients in the four-derivative supergravity Lagrangian and calculates the subleading terms in the large-N expansion of partition functions for a class of three-dimensional N = 2 SCFTs of class R. Additionally, the study determines the leading correction to the Bekenstein-Hawking entropy of black holes and proposes conjectures about the perturbative partition function of Chern-Simons theory on closed hyperbolic three-manifolds with complexified ADE gauge groups.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Nikolay Bobev, Anthony M. Charles, Kiril Hristov, Valentin Reys
Summary: Utilizing conformal supergravity techniques, this study explores four-derivative corrections in four-dimensional gauged supergravity. The four-derivative Lagrangian for the N=2 gravity multiplet's propagating degrees of freedom is shown to be determined by two real dimensionless constants, with all solutions of the two-derivative equations of motion also solving the four-derivative equations of motion. The study also provides explicit calculations of the effects of four-derivative terms on black hole solutions and expands the results to include matter multiplets in the presence of higher-derivative terms.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Seyed Morteza Hosseini, Kiril Hristov, Alberto Zaffaroni
Summary: This study constructed generalizations of AdS(3) x M-7 type IIB vacua, specifically focusing on electrically charged and rotating supersymmetric black strings in AdS(5) x S-5 with general magnetic fluxes on a spindle. The counting of microstates was performed using the charged Cardy formula, and the general form of the anomaly polynomial of the dual N = (0, 2) CFT in two dimensions was derived and obtained via a simple gluing procedure.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Kiril Hristov, Valentin Reys
Summary: The study derives the general form of one-loop corrections to observables in asymptotically AdS(4) supersymmetric backgrounds of abelian gauged supergravity using the Atiyah-Singer index theorem. It proposes a general fixed-point formula for the logarithmic corrections based on simple topological data and a single dynamical coefficient that uniquely determine these corrections.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Kiril Hristov
Summary: We reinterpret the OSV formula for the on-shell action/entropy function of asymptotically flat BPS black holes as a fixed point formula that is formally equivalent to a recent gluing proposal for asymptotically AdS(4) black holes. This prompts a conjecture that the complete perturbative answer for the most general gravitational building block of 4d N = 2 supergravity at a single fixed point takes the form of a Nekrasov-like partition function with equivariant parameters related to the higher-derivative expansion of the prepotential. In turn this leads to a simple localization-like proposal for a set of supersymmetric partition functions in (UV completed) 4d N = 2 supergravity theories.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Nikolay Bobev, Kiril Hristov, Valentin Reys
Summary: In this study, we investigate four-derivative corrections to 5d N = 2 minimal gauged supergravity using tools from conformal supergravity. We identify two supersymmetric invariants and construct the action in the Poincare frame in terms of their coefficients. Applying these results in holography, we find that the four-derivative terms in the supergravity action lead to corrections in the conformal anomalies of the dual 4d N = 1 SCFT. We also analyze the corrections to the entropy of supersymmetric black string solutions and discuss the explicit embeddings of 5d supergravity in string and M-theory to determine the higher-derivative coefficients in terms of microscopic parameters.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Kiril Hristov
Summary: In this study, we apply the conjecture of gravitational building blocks to analyze M-theory on S-7/Z(k). By utilizing the known localization results for the holographically dual ABJM theory, we determine higher derivative corrections to the AdS(4) supergravity, quantum corrections, and predict ABJM observables using the uniquely fixed gravitational block.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Kiril Hristov
Summary: We explore the BPS limit of asymptotically flat black hole thermodynamics and find analogies with black holes in anti-de Sitter space. We consider specific models in pure Einstein-Maxwell theory and find that the BPS limit is classically well-defined, different from extremality, and allows the evaluation of all BPS chemical potentials.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Kiril Hristov, Stefanos Katmadas, Chiara Toldo
