PIRSA:18120010

Seeing Orbifold GUTs In Primordial Non-Gaussianities - Speaker: Soubikh Kumar

Ferneyhough, A. (2018). Seeing Orbifold GUTs In Primordial Non-Gaussianities - Speaker: Soubikh Kumar. Perimeter Institute. https://pirsa.org/18120010

Ferneyhough, Amanda. Seeing Orbifold GUTs In Primordial Non-Gaussianities - Speaker: Soubikh Kumar. Perimeter Institute, Dec. 07, 2018, https://pirsa.org/18120010 

          @misc{ pirsa_PIRSA:18120010,
            doi = {10.48660/18120010},
            url = {https://pirsa.org/18120010},
            author = {Ferneyhough, Amanda},
            keywords = {Particle Physics},
            language = {en},
            title = {Seeing Orbifold GUTs In Primordial Non-Gaussianities - Speaker: Soubikh Kumar},
            publisher = {Perimeter Institute},
            year = {2018},
            month = {dec},
            note = {PIRSA:18120010 see, \url{https://pirsa.org}}
          }

Amanda Ferneyhough

Talk number
PIRSA:18120010
Collection
Talk Type
Subject
Abstract

The minimal Standard Model running of the gauge couplings gives us a hint of a Grand Unified Theory (GUT) at M_U ~ 10^14 GeV — a scale, however, too high to probe directly via collider searches. Fortunately, since the inflationary Hubble scale H can be as high as  5 x 10^13 GeV ~ M_U, such GUT scale states can be cosmologically produced during inflation and contribute to primordial non-Gaussianity (NG).

In this talk, I will explore the possibility of doing on-shell, mass-spin spectroscopy of GUT-states by studying such NG contributions in an extra-dimensional framework of orbifold GUTs. I will identify an interesting regime where the extra dimension is stabilized close to the onset of a horizon and find that the KK gravitons and KK gauge bosons can mediate observable NG providing a direct probe of orbifold GUTs.