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hep-th2025
A single-cut discontinuity for cosmological correlators from unitarity and analyticity
Shibam Das, Debanjan Karan, Babli Khatun +1
We derive discontinuity relations, also known as cutting rules, and explore the analytic properties of cosmological correlators, fundamental observables of the primordial universe.…
hep-th2025★ 1 cited
All Order Classical Electromagnetic Soft Theorems
Debanjan Karan, Babli Khatun, Biswajit Sahoo +1
If a set of charged objects collide in space and the fragments disperse, then this process will emit electromagnetic waves. Classical soft photon theorem determines the constant te…