5 papers
The Scalar Chemical Potential in Cosmological Collider Physics
Arushi Bodas, Soubhik Kumar, Raman Sundrum
Non-analyticity in co-moving momenta within the non-Gaussian bispectrum is a distinctive sign of on-shell particle production during inflation, presenting a unique opportunity for…
Phase Transitions from the Fifth Dimension
Kaustubh Agashe, Peizhi Du, Majid Ekhterachian +2
We study the cosmological transition of 5D warped compactifications, from the high-temperature black-brane phase to the low-temperature Randall-Sundrum I phase. The transition proc…
Cosmological Phase Transition of Spontaneous Confinement
Kaustubh Agashe, Peizhi Du, Majid Ekhterachian +2
The dynamics of a cosmological (de)confinement phase transition is studied in nearly conformally invariant field theories, where confinement is predominantly spontaneously generate…
Cosmological Collider Physics and the Curvaton
Soubhik Kumar, Raman Sundrum
Primordial non-Gaussianity signatures of extremely heavy particles are re-examined within a simple alternative to the standard inflationary paradigm, in which the primordial fluctu…
Seeing Higher-Dimensional Grand Unification In Primordial Non-Gaussianities
Soubhik Kumar, Raman Sundrum
The observed low-energy values of the gauge couplings, extrapolated via the minimal Standard Model Renormalization Group evolution, hint at the excit…