Cosmological signals of a mirror twin Higgs

  title={Cosmological signals of a mirror twin Higgs},
  author={Nathaniel Craig and Seth C. Koren and Timothy D Trott},
  journal={Journal of High Energy Physics},
A bstractWe investigate the cosmology of the minimal model of neutral naturalness, the mirror Twin Higgs. The softly-broken mirror symmetry relating the Standard Model to its twin counterpart leads to significant dark radiation in tension with BBN and CMB observations. We quantify this tension and illustrate how it can be mitigated in several simple scenarios that alter the relative energy densities of the two sectors while respecting the softly-broken mirror symmetry. In particular, we… CONTINUE READING

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