A bstract A precise link is derived between scalar-graviton S-matrix elements and
expectation values of operators in a worldline quantum field theory (WQFT), both used to …

A bstract We study the classical double copy of massive spinning objects in the worldline
quantum field theories (WQFT) formalism. We couple the\(\mathcal {N}\)= 1 supersymmetric …

A bstract We consider tree-level off-shell currents of two massive particles and n massless
bosons in the classical limit, which can be fused into the classical limit of n+ 2 scattering …

A bstract Using the worldline quantum field theory (WQFT) formalism for classical scattering,
we study the deflection of light by a heavy massive spinless/spinning object. WQFT requires …

A bstract There has been a renewed interest in the description of dressed asymptotic states
à la Faddeev-Kulish. In this regard, a worldline representation for asymptotic states dressed …

Perturbative quantum field theory usually uses second quantisation and Feynman diagrams.
The worldline formalism provides an alternative approach based on first quantised particle …

A bstract In the first-quantised worldline approach to quantum field theory, a long-standing
problem has been to extend this formalism to amplitudes involving open fermion lines while …

The presence of strong electromagnetic fields adds huge complexity to QED Feynman
diagrams, such that new methods are required to calculate higher-loop and higher …

A bstract In this work we present an algebraic approach to the dynamics and perturbation
theory at tree-level for gauge theories coupled to matter. The field theories we will consider …

A bstract Bi-adjoint scalars are helpful in studying properties of color/kinematics duality and
the double copy, which relates scattering amplitudes of gauge and gravity theories. Here we …