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Tadpole contribution to magnetic photon-graviton conversion
Naser Ahmadiniaz, Fiorenzo Bastianelli, Felix Karbstein +1
Photon-graviton conversion in a magnetic field is a process that is usually studied at tree level, but the one-loop corrections due to scalars and spinors have also been calculated…
Multiloop QED in the Euler-Heisenberg approach
Idrish Huet, Michel Rausch de Traubenberg, Christian Schubert
I summarize what is known about the Euler-Heisenberg Lagrangian and its multiloop corrections for scalar and spinor QED, in various types of constant fields, and in various dimensi…
Master formulas for the dressed scalar propagator in a constant field
Aftab Ahmad, Naser Ahmadiniaz, Olindo Corradini +2
The worldline formalism has previously been used for deriving compact master formulas for the one-loop N-photon amplitudes in both scalar and spinor QED, and in the vacuum as well…
Multiphoton amplitudes and generalized LKF transformation in Scalar QED
Naser Ahmadiniaz, Adnan Bashir, Christian Schubert
We apply the worldline formalism to amplitudes in scalar quantum electrodynamics (QED) involving open scalar lines, with an emphasis on their non-perturbative gauge dependence. At…
Integral representations combining ladders and crossed-ladders
F. Bastianelli, A. Huet, C. Schubert +2
We use the worldline formalism to derive integral representations for three classes of amplitudes in scalar field theory: (i) the scalar propagator exchanging N momenta with a scal…
Form factor decomposition of the off-shell four-gluon amplitudes
Naser Ahmadiniaz, Christian Schubert
We show how to use the Bern-Kosower master formula, originally a generating functional for on-shell gluon matrix elements, to derive well-organized form factor decompositions of th…