String amplitudes with mass regularization

by Marcus Berg (Karlstad U.)

Wednesday 4 Jun 2025, 14:00 → 15:00 Europe/Rome

Aula Galileo

I will review order work with Schlotterer and Buchberger,
and more recent work with Haack and Zimmerman, on closed string
one-loop amplitudes. We use the Bern-Dixon-Kosower generating function
method to compute covariant amplitudes with external mass regulators,
as a complement to helicity amplitudes. We exploit the simplicity of
all-mass Feynman amplitudes that enjoy dual conformal symmetry.