| 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. |
