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hep-th2026
Exact All-Level Positivity of the Bosonic Veneziano Amplitude
Qi Chen, Yuan Yin
Tree-level partial-wave unitarity of the open bosonic Veneziano amplitude follows indirectly from the no-ghost theorem, but a direct proof from the beta function has been missing a…
astro-ph.CO2026
Resonant production of heavy particles during inflation and its gravitational wave signature
Qi Chen, Yuan Yin
We show that a quadratic -breaking term, together with an effective chemical potential induced by a dimension five derivative coupling between the inflaton and the cur…