24–29 Apr 2025
国科大杭州高等研究院 Hangzhou Institute for Advanced Study (UCAS)
Asia/Shanghai timezone

Locality and unitarity from hidden zeros

26 Apr 2025, 11:00
30m

Speaker

Laurentiu Rodina (BIMSA)

Description

Hidden zeros are a novel feature of quantum field theory, corresponding to special kinematic configurations where scattering amplitudes unexpectedly vanish across a broad class of theories. In this talk, I will show that these hidden zeros are precisely equivalent to a previously unnoticed form of Britto-Cachazo-Feng-Witten (BCFW) scaling, governing the high-energy behavior of amplitudes. Using this equivalence, I prove that, under the assumption of locality, the tree-level amplitudes of Tr($\phi^3$) theory are uniquely fixed by hidden zeros — demonstrating that unitarity is not a fundamental principle, but rather an emergent consequence. I also extend such results to loop-level.

Author

Laurentiu Rodina (BIMSA)

Presentation materials