Reza Ebadi

Department of Physics, University of Maryland

Quantum Technology Center, University of Maryland

Cosmological Collider Physics using Primordial Clocks and Clicks

Abstract: On-shell production of heavy degrees of freedom during the inflationary era can be imprinted on cosmological correlation functions, thereby offering a unique opportunity of cosmological spectroscopy at energy scales far beyond what is achievable with any conceivable terrestrial collider. Such “collider signals”, however, are typically Boltzmann-suppressed above the inflationary Hubble scale, limiting the potential reach of the “cosmological collider.” Using a generic framework, we show that classical features in the inflationary landscape excite unsuppressed quantum modes of heavy fields, which leave observable signatures in primordial non-Gaussianity. In addition to unsuppressed, non-Gaussian collider signals, the analyzed models predict scale-dependence as well as precursor signatures in the inflationary power spectrum. Due to their rich phenomenology, these models present viable targets for next-generation cosmological surveys.

یکشنبه 8 خرداد 1401، ساعت 19:00

Sunday 29 May 2022 – 19:00 Tehran Time

اتاق سمینار مجازی –Virtual Seminar Room

https://vc.sharif.edu/ch/cosmology

گزینه ورود به صورت مهمان – Enter as a Guest