Results 101 to 110 of about 36,882 (207)

The S-matrix bootstrap with neural optimizers. Part I. Zero double discontinuity

Journal of High Energy Physics
In this work, we develop machine learning techniques to study nonperturbative scattering amplitudes. We focus on the two-to-two scattering amplitude of identical scalar particles and study a toy model where we set the double discontinuity to zero ...
Mehmet Asım Gümüş, Damien Leflot, Piotr Tourkine, Alexander Zhiboedov   +3 more
doaj   +1 more source

Effective gravitational couplings of Kaluza-Klein gauge theories

Journal of High Energy Physics, 2023
We study the effective gravitational couplings of four-dimensional gauge theories with eight supercharges. The class of theories we analyse are arrived at via Kaluza-Klein compactification of five-dimensional gauge theories.
Sujay K. Ashok, Renjan Rajan John, T. J. Layon, Sujoy Mahato, Madhusudhan Raman   +4 more
doaj   +1 more source

Analytic structure in the coupling constant plane in perturbative QCD

, 2003
We investigate the analytic structure of the Borel-summed perturbative QCD amplitudes in the complex plane of the coupling constant. Using the method of inverse Mellin transform, we show that the prescription dependent Borel-Laplace integral can be cast,
A. Sokal, A.H. Mueller, D. Broadhurst, G. Cvetič, G. Parisi, I. Caprini, I. Caprini, I. Caprini, I. Caprini, Irinel Caprini, J. Fischer, Jan Fischer, M. Beneke, M. Beneke, M. Beneke, M. Beneke, M. Neubert, N.N. Khuri, P. Ball, T. Lee   +19 more
core   +1 more source

The Purely Leptonic and Semileptonic Decays of Ds∗ Meson

Advances in High Energy Physics, Volume 2026, Issue 1, 2026.
With the potential prospects of the Ds∗ at high‐luminosity heavy‐flavor experiments in the future, we investigated the CKM‐favored and tree‐dominated leptonic Ds∗⟶ℓν¯ℓ,ℓ=e,μ,τ and semileptonic Ds∗⟶Mℓ′ν¯ℓ′ M=ϕ,η′,K and ℓ′=e,μ weak decays in the standard model (SM).
Xiao-Lin Wang, Rui Sun, Li-Ting Wang, Roelof Bijker   +3 more
wiley   +1 more source

Non-perturbative effects in μ → eγ

Journal of High Energy Physics, 2019
We compute the non-perturbative contribution of semileptonic tensor operators q ¯ σ μ ν q ℓ ¯ σ μ ν ℓ $$ \left(\overline{q}{\sigma}^{\mu \nu }q\right)\left(\overline{\ell}{\sigma}_{\mu \nu}\ell \right) $$ to the purely leptonic process μ → eγ and to the ...
Wouter Dekens, Elizabeth E. Jenkins, Aneesh V. Manohar, Peter Stoffer   +3 more
doaj   +1 more source

Accuracy Estimation of the Numerical Solutions for Chaotic Regime of the Pendulum With External and Parametric Excitation

Journal of Applied Mathematics, Volume 2026, Issue 1, 2026.
This study involves the development of a framework for checking the accuracy of built‐in algorithms from Mathcad software. The built‐in algorithms used inside Mathcad software include Runge–Kutta method of the fourth order (RK4), Adams method, backward differential formula, AdamsBDF, Radau, Bulstoer, Stiffr, and Stiffb methods.
M. C. Kekana, M. Y. Shatalov, S. E. Fadugba, N. Jeeva, T. O. Tong, Theodore Simos   +5 more
wiley   +1 more source

Computational Modeling of Reticular Materials: The Past, the Present, and the Future

Advanced Materials, Volume 37, Issue 52, December 29, 2025.
Reticular materials are advanced materials with applications in emerging technologies. A thorough understanding of material properties at operating conditions is critical to accelerate the deployment at an industrial scale. Herein, the status of computational modeling of reticular materials is reviewed, supplemented with topical examples highlighting ...
Wim Temmerman, Ruben Goeminne, Kuber Singh Rawat, Veronique Van Speybroeck   +3 more
wiley   +1 more source

Comments on the RG‐Flow in Open String Field Theory

Fortschritte der Physik, Volume 73, Issue 12, December 2025.
Abstract We define a metric G$G$ on the KBc‐subalgebra modulo gauge and describe the worldsheet RG‐flow as the gradient flow of the action of cubic open string field theory, where the flow lines are kink‐solitons. In particular, for a constant tachyon the gradient flow equations are equivalent to the RG‐equations. Additionally, a more general family of
Julius Hristov
wiley   +1 more source

Elliptic genus derivation of 4d holomorphic blocks

Journal of High Energy Physics, 2018
We study elliptic vortices on ℂ × T 2 by considering the 2d quiver gauge theory describing their moduli spaces. The elliptic genus of these moduli spaces is the elliptic version of vortex partition function of the 4d theory. We focus on two examples: the
Matteo Poggi
doaj   +1 more source

Large-order behavior and nonperturbative effects [PDF]

Nuclear Physics B, 1995
Abstract We consider the energy-dependence of the large-order behavior of forward scattering amplitudes in theories having explicit mass parameters and instanton solutions. We show that in weak coupling theories the exponential part of the Espinosa-Ringwald type cross section can be determined by taking the minimum element of the perturbative series,
openaire   +1 more source