<p>We describe a novel variation of the mirror twin Higgs model in which the color gauge group in both sectors is extended to SU(4)<sub><i>c</i></sub> and spontaneously broken to SU(3)<sub><i>c</i></sub> exclusively in the visible sector. Through this process, the mirror <i>Z</i><sub>2</sub> symmetry is spontaneously broken, allowing for a phenomenologically viable electroweak vacuum alignment. This structure produces interesting collider signatures, including heavy vectors and fermions with fractional electric charges. The twin sector, with unbroken SU(4)<sub><i>c</i></sub>, produces interesting cosmological characteristics, such as the possibility to reduce ∆<i>N</i><sub>eff</sub> and stable spin-0 baryons. The enlarged top quark sector required by the extended color gauge symmetry preserves naturalness, with even less tuning than the original twin Higgs in many circumstances.</p>

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Extended color twin Higgs

  • Brian Batell,
  • Thomas Cochran,
  • Logan Page,
  • Christopher B. Verhaaren

摘要

We describe a novel variation of the mirror twin Higgs model in which the color gauge group in both sectors is extended to SU(4)c and spontaneously broken to SU(3)c exclusively in the visible sector. Through this process, the mirror Z2 symmetry is spontaneously broken, allowing for a phenomenologically viable electroweak vacuum alignment. This structure produces interesting collider signatures, including heavy vectors and fermions with fractional electric charges. The twin sector, with unbroken SU(4)c, produces interesting cosmological characteristics, such as the possibility to reduce ∆Neff and stable spin-0 baryons. The enlarged top quark sector required by the extended color gauge symmetry preserves naturalness, with even less tuning than the original twin Higgs in many circumstances.