All Outputs (13)

Stückelberg path to pure de Sitter supergravity (2025)
Journal Article
Bansal, S., Nagy, S., Padilla, A., & Zavala, I. (2025). Stückelberg path to pure de Sitter supergravity. Physical Review D, 111, Article 125004. https://doi.org/10.1103/PhysRevD.111.125004

We advance the study of pure de Sitter supergravity by introducing a finite formulation of unimodular supergravity via the super-Stückelberg mechanism. Building on previous works, we construct a complete four-dimensional action of spontaneously broke... Read More about Stückelberg path to pure de Sitter supergravity.

General hierarchy of charges at null infinity via the Todd polynomials (2025)
Journal Article
Nagy, S., Peraza, J., & Pizzolo, G. (2025). General hierarchy of charges at null infinity via the Todd polynomials. Physical Review D, 111(6), Article L061903. https://doi.org/10.1103/PhysRevD.111.L061903

We give a general procedure for constructing an extended phase space for Yang-Mills theory at null infinity, capable of handling the asymptotic symmetries and construction of charges responsible for subn-leading soft theorems at all orders. The proce... Read More about General hierarchy of charges at null infinity via the Todd polynomials.

Light-cone actions and correlators of self-dual theories in AdS₄ (2025)
Journal Article
Chowdhury, C., Doran, G., Lipstein, A., Monteiro, R., Nagy, S., & Singh, K. (2025). Light-cone actions and correlators of self-dual theories in AdS₄. Journal of High Energy Physics, 2025(1), Article 172. https://doi.org/10.1007/JHEP01%282025%29172

Self-dual Yang-Mills and Einstein gravity in Euclidean AdS4 are useful toy models because they can be described by simple scalar Lagrangians exhibiting a new manifestation of the colour/kinematics duality, as recently shown by two of the authors. In... Read More about Light-cone actions and correlators of self-dual theories in AdS₄.

Infinite-dimensional hierarchy of recursive extensions for all sub n -leading soft effects in Yang-Mills (2024)
Journal Article
Nagy, S., Peraza, J., & Pizzolo, G. (2024). Infinite-dimensional hierarchy of recursive extensions for all sub n -leading soft effects in Yang-Mills. Journal of High Energy Physics, 2024(12), Article 68. https://doi.org/10.1007/jhep12%282024%29068

Building on our proposal in [1], we present in detail the construction of the extended phase space for Yang-Mills at null infinity, containing the asymptotic symmetries and the charges responsible for subn-leading soft theorems at all orders. The gen... Read More about Infinite-dimensional hierarchy of recursive extensions for all sub n -leading soft effects in Yang-Mills.

Self-dual cosmology (2024)
Journal Article
González, M. C., Lipstein, A., & Nagy, S. (2024). Self-dual cosmology. Journal of High Energy Physics, 2024(10), Article 183. https://doi.org/10.1007/jhep10%282024%29183

We construct cosmological spacetimes with a self-dual Weyl tensor whose dynamics are described by conformally coupled scalars with only cubic self-interactions. Similar to the previously discovered cases in flat and (Anti) de Sitter backgrounds, the... Read More about Self-dual cosmology.

Weyl-Lewis-Papapetrou coordinates, self-dual Yang-Mills equations and the single copy (2024)
Journal Article
Cardoso, G. L., Mahapatra, S., & Nagy, S. (2024). Weyl-Lewis-Papapetrou coordinates, self-dual Yang-Mills equations and the single copy. Journal of High Energy Physics, 2024(10), Article 30. https://doi.org/10.1007/jhep10%282024%29030

We consider the dimensional reduction to two dimensions of certain gravitational theories in D ≥ 4 dimensions at the two-derivative level. It is known that the resulting field equations describe an integrable system in two dimensions which can also b... Read More about Weyl-Lewis-Papapetrou coordinates, self-dual Yang-Mills equations and the single copy.

What can abelian gauge theories teach us about kinematic algebras? (2024)
Journal Article
Armstrong-Williams, K., Nagy, S., White, C. D., & Wikeley, S. (2024). What can abelian gauge theories teach us about kinematic algebras?. Journal of High Energy Physics, 2024(8), Article 169. https://doi.org/10.1007/jhep08%282024%29169

The phenomenon of BCJ duality implies that gauge theories possess an abstract kinematic algebra, mirroring the non-abelian Lie algebra underlying the colour information. Although the nature of the kinematic algebra is known in certain cases, a full u... Read More about What can abelian gauge theories teach us about kinematic algebras?.

Convolutional double copy in (anti) de Sitter space (2024)
Journal Article
Liang, Q., & Nagy, S. (2024). Convolutional double copy in (anti) de Sitter space. Journal of High Energy Physics, 2024(4), Article 139. https://doi.org/10.1007/jhep04%282024%29139

The double copy is a remarkable relationship between gauge theory and gravity that has been explored in a number of contexts, most notably scattering amplitudes and classical solutions. The convolutional double copy provides a straightforward method... Read More about Convolutional double copy in (anti) de Sitter space.

Gauge independent kinematic algebra of self-dual Yang-Mills theory (2023)
Journal Article
Bonezzi, R., Díaz-Jaramillo, F., & Nagy, S. (2023). Gauge independent kinematic algebra of self-dual Yang-Mills theory. Physical Review D, 108, Article 065007

The double-copy program relies crucially on the so-called color-kinematics duality which, in turn, is widely believed to descend from a kinematic algebra possessed by gauge theories. In this paper we construct the kinematic algebra of gauge-invariant... Read More about Gauge independent kinematic algebra of self-dual Yang-Mills theory.

Self-Dual Gravity and Color-Kinematics Duality in AdS4 (2023)
Journal Article
Lipstein, A., & Nagy, S. (2023). Self-Dual Gravity and Color-Kinematics Duality in AdS4. Physical Review Letters, 131(8), Article 081501. https://doi.org/10.1103/physrevlett.131.081501

Radiative phase space extensions at all orders in r for self-dual Yang-Mills and gravity (2023)
Journal Article
Nagy, S., & Peraza, J. (2023). Radiative phase space extensions at all orders in r for self-dual Yang-Mills and gravity. Journal of High Energy Physics, 2023(2), Article 202. https://doi.org/10.1007/jhep02%282023%29202

Working in the self-dual sector for Yang-Mills and gravity, we show how to construct an extended phase space at null infinity, to all orders in the radial expansion. This formalises the symmetry origin of the infrared behaviour of these theories to a... Read More about Radiative phase space extensions at all orders in r for self-dual Yang-Mills and gravity.

Poisson mixture regression for Bayesian inference on large over-dispersed transportation origin-destination matrices (2012)
Presentation / Conference Contribution
Perrakis, K., Karlis, D., Cools, M., Janssens, D., & Wets, G. (2012, December). Poisson mixture regression for Bayesian inference on large over-dispersed transportation origin-destination matrices. Presented at 27th International Workshop on Statistical Modelling, Prague

Penalized regression on principal manifolds with application to combustion modelling (2012)
Presentation / Conference Contribution
Einbeck, J., Isaac, B., Evers, L., & Parente, A. (2012, December). Penalized regression on principal manifolds with application to combustion modelling. Presented at International workshop on statistical modelling, Prague

For multivariate regression problems featuring strong and non–linear dependency patterns between the involved predictors, it is attractive to reduce the dimension of the estimation problem by approximating the predictor space through a principal surf... Read More about Penalized regression on principal manifolds with application to combustion modelling.