Speaker: Marcus Berg
Title: String amplitudes with mass regularization
Abstract: 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.
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