APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Yi-Peng Wu (Tokyo U. RESCEU)
Title: Higgs signatures in primordial non-Gaussianities
Date (JST): Wed, Mar 13, 2019, 13:30 - 14:30
Place: Seminar Room A
Related File: 2251.pdf
Abstract: Signals of particle production during inflation are encoded as
non-analytic momentum scaling in primordial non-Gaussianities. These
non-analytic signatures can be sourced by Standard Model particles with a
modified Higgs scale uplifted by the slow-roll dynamics of inflation. We
show that such a lifting mechanism becomes more efficient with the presence
of a small speed of sound in the effective theory of inflation. As a
primary step towards detecting new particles in the cosmological collider
program, non-Gaussianities due to heavy Higgs production can act as
important background signals to be tested by future cosmological surveys.