PIRSA:15100069 Scientific Series Particle Physics

DOI10.48660/15100069

Series: Particle Physics

Lasenby, R. (2015). Dark matter from the Fraternal Twin Higgs. Perimeter Institute. https://pirsa.org/15100069

Lasenby, Robert. Dark matter from the Fraternal Twin Higgs. Perimeter Institute, Oct. 06, 2015, https://pirsa.org/15100069 

@misc{ pirsa_PIRSA:15100069,
  doi = {10.48660/15100069},
  url = {https://pirsa.org/15100069},
  author = {Lasenby, Robert},
  keywords = {Particle Physics},
  language = {en},
  title = {Dark matter from the Fraternal Twin Higgs},
  publisher = {Perimeter Institute},
  year = {2015},
  month = {oct},
  note = {PIRSA:15100069 see, \url{https://pirsa.org}}
}

Abstract

Twin Higgs theories attempt to solve the little hierarchy problem - why has the LHC not yet observed new states stabilising the EW scale? - by introducing a SM-neutral twin sector, related to the SM by an approximate Z_2 symmetry. The physical Higgs is then a PNGB mixture from both sectors, and acts as a portal between them. In this talk, I will discuss the cosmology of minimal (“fraternal”) Twin Higgs models. Higgs portal interactions establish thermal equilibrium between the SM and twin sector at high temperatures, giving a thermal history with possibilities for both symmetric dark matter (through a “twin WIMP miracle”), and asymmetric dark matter (from twin QCD states which naturally have GeV-scale masses). More generally, relic abundances of cosmologically stable states place constraints on the parameters of the theory, and twin sector phase transitions need to be considered.

Resources

Next talk

Related Talks