Cosmological Collider Physics using Primordial Clocks and Clicks

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

گزینه ورود به صورت مهمان – Enter as a Guest

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