Outputs (83)

Perturbations of Q-balls: from spectral structure to radiation pressure (2024)
Journal Article
Ciurla, D., Dorey, P., Romańczukiewicz, T., & Shnir, Y. (2024). Perturbations of Q-balls: from spectral structure to radiation pressure. Journal of High Energy Physics, 2024(7), Article 196. https://doi.org/10.1007/jhep07%282024%29196

We investigate Q-balls in a 1+1 dimensional complex scalar field theory. We find that the relaxation of a squashed Q-ball is dominated by the decay of a normal mode through nonlinear coupling to scattering modes and a long-lasting quasi-normal mode.... Read More about Perturbations of Q-balls: from spectral structure to radiation pressure.

Oscillons in gapless theories (2024)
Journal Article
Dorey, P., Romańczukiewicz, T., Shnir, Y., & Wereszczyński, A. (2024). Oscillons in gapless theories. Physical Review D, 109(8), Article 085017. https://doi.org/10.1103/physrevd.109.085017

We show that large scale oscillons, i.e., quasiperiodic, long-living particlelike solutions, may exist in massless theories, too. Their existence is explained using an effective (smeared) mass threshold which takes into account nonlinear (finite) per... Read More about Oscillons in gapless theories.

From tree- to loop-simplicity in affine Toda theories II: higher-order poles and cut decompositions (2023)
Journal Article
Dorey, P., & Polvara, D. (2023). From tree- to loop-simplicity in affine Toda theories II: higher-order poles and cut decompositions. Journal of High Energy Physics, 2023(10), Article 177. https://doi.org/10.1007/jhep10%282023%29177

Recently we showed how, in two-dimensional scalar theories, one-loop threshold diagrams can be cut into the product of one or more tree-level diagrams [1]. Using this method on the ADE series of Toda models, we computed the double- and single-pole co... Read More about From tree- to loop-simplicity in affine Toda theories II: higher-order poles and cut decompositions.

Collisions of weakly-bound kinks in the Christ-Lee model (2023)
Journal Article
Dorey, P., Gorina, A., Romańczukiewicz, T., & Shnir, Y. (2023). Collisions of weakly-bound kinks in the Christ-Lee model. Journal of High Energy Physics, 2023(9), Article 45. https://doi.org/10.1007/jhep09%282023%29045

We investigate soliton collisions in a one-parameter family of scalar field theories in 1+1 dimensions which was first discussed by Christ and Lee. The models have a sextic potential with three local minima, and for suitably small values of the param... Read More about Collisions of weakly-bound kinks in the Christ-Lee model.

Multikink scattering in the ϕ6 model revisited (2022)
Journal Article
Adam, C., Dorey, P., Martín-Caro, A. G., Huidobro, M., Oles, K., Romanczukiewicz, T., Shnir, Y., & Wereszczynski, A. (2022). Multikink scattering in the ϕ6 model revisited. Physical Review D, 106(12), Article 125003. https://doi.org/10.1103/physrevd.106.125003

Antikink-kink (KK) collisions in the ¯ ϕ6 model exhibit resonant scattering although the ϕ6 kinks do not support any bound states to which energy could be transferred. In P. Dorey et al. [Kink-Antikink Collisions in the ϕ6 Model, Phys. Rev. Lett. 107... Read More about Multikink scattering in the ϕ6 model revisited.

The SAGEX Review on scattering amplitudes (2022)
Journal Article
Travaglini, G., Brandhuber, A., Dorey, P. E., McLoughlin, T. A., Abreu, S., Bern, Z., Bjerrum-Bohr, N. E. J., Blümlein, J., Britto, R., Carrasco, J. J. M., Chicherin, D., Chiodaroli, M., Damgaard, P. H., Del Duca, V., Dixon, L. J., Dorigoni, D., Duhr, C., Geyer, Y., Green, M. B., Herrmann, E., …White, C. (2022). The SAGEX Review on scattering amplitudes. Journal of Physics A: Mathematical and Theoretical, 55(44), Article 443001. https://doi.org/10.1088/1751-8121/ac8380

This is an introduction to, and invitation to read, a series of review articles on scattering amplitudes in gauge theory, gravity, and superstring theory. Our aim is to provide an overview of the field, from basic aspects to a selection of current (2... Read More about The SAGEX Review on scattering amplitudes.

From tree- to loop-simplicity in affine Toda theories I: Landau singularities and their subleading coefficients (2022)
Journal Article
Dorey, P., & Polvara, D. (2022). From tree- to loop-simplicity in affine Toda theories I: Landau singularities and their subleading coefficients. Journal of High Energy Physics, 2022(9), Article 220. https://doi.org/10.1007/jhep09%282022%29220

Various features of the even order poles appearing in the S-matrices of simply-laced affine Toda field theories are analysed in some detail. In particular, the coefficients of first- and second-order singularities appearing in the Laurent expansion o... Read More about From tree- to loop-simplicity in affine Toda theories I: Landau singularities and their subleading coefficients.

Tree level integrability in 2d quantum field theories and affine Toda models (2022)
Journal Article
Dorey, P., & Polvara, D. (2022). Tree level integrability in 2d quantum field theories and affine Toda models. Journal of High Energy Physics, 2022(2), https://doi.org/10.1007/jhep02%282022%29199

We investigate the perturbative integrability of massive (1+1)-dimensional bosonic quantum field theories, focusing on the conditions for them to have a purely elastic S-matrix, with no particle production and diagonal scattering, at tree level. For... Read More about Tree level integrability in 2d quantum field theories and affine Toda models.

Resonance structures in kink-antikink collisions in a deformed sine-Gordon model (2021)
Journal Article
Dorey, P., Gorina, A., Perapechka, I., Romańczukiewicz, T., & Shnir, Y. (2021). Resonance structures in kink-antikink collisions in a deformed sine-Gordon model. Journal of High Energy Physics, 2021(9), Article 145. https://doi.org/10.1007/jhep09%282021%29145

We study kink-antikink collisions in a model which interpolates smoothly between the completely integrable sine-Gordon theory, the ϕ4 model, and a ϕ6-like model with three degenerate vacua. We find a rich variety of behaviours, including integrabilit... Read More about Resonance structures in kink-antikink collisions in a deformed sine-Gordon model.

Staccato radiation from the decay of large amplitude oscillons (2020)
Journal Article
Dorey, P., Romanczukiewicz, T., & Shnir, Y. (2020). Staccato radiation from the decay of large amplitude oscillons. Physics Letters B, 806, Article 135497. https://doi.org/10.1016/j.physletb.2020.135497

We study the decay of large amplitude, almost periodic breather-like states in a deformed sine-Gordon model in one spatial dimension. We discover that these objects decay in a staggered fashion via a series of transitions, during which higher harmoni... Read More about Staccato radiation from the decay of large amplitude oscillons.