4 papers
Self-consistent computation of pair production from non-relativistic effective field theories in the Keldysh-Schwinger formalism
Tobias Binder, Edward Wang
Sommerfeld-enhanced annihilation cross sections in the presence of nearly zero-energy bound states can become so large that perturbative partial-wave unitarity appears to be violat…
BSFfast: Rapid computation of bound-state effects on annihilation in the early Universe
Tobias Binder, Mathias Garny, Jan Heisig +1
Bound-state formation (BSF) can have a large impact on annihilation of new physics particles with long-range interactions in the early Universe. In particular, the inclusion of exc…
Towards a precision calculation of in the Standard Model IV: Estimating the impact of positronium formation
Tobias Binder, Marco Drewes, Yannis Georis +3
We present a first assessment of how the previously unexplored effect of positronium formation can impact on the value of the effective number of neutrino species in the Standard M…
Perturbative Unitarity Violation in Radiative Capture Transitions to Dark Matter Bound States
Martin Beneke, Tobias Binder, Lorenzo de Ros +2
We investigate the formation of bound states of non-relativistic dark matter particles subject to long-range interactions through radiative capture. The initial scattering and fina…