Abstract
We present a model wherein the Higgs mass is protected from the quadratic one-loop top quark corrections by scalar particles that are complete singlets under the Standard Model (SM) gauge group. While bearing some similarity to Folded Supersymmetry, the construction is purely four dimensional and enjoys more parametric freedom, allowing electroweak symmetry breaking to occur easily. The cancelation of the top loop quadratic divergence is ensured by a Z3 symmetry that relates the SM top sector and two hidden top sectors, each charged under its own hidden color group. In addition to the singlet scalars, the hidden sectors contain electroweak-charged supermultiplets below the TeV scale, which provide the main access to this model at colliders. The phenomenology presents both differences and similarities with respect to other realizations of neutral naturalness. Generally, the glueballs of hidden color have longer decay lengths. The production of hidden sector particles results in quirk or squirk bound states, which later annihilate. We survey the possible signatures and corresponding experimental constraints.
Highlights
The Z2 guarantees the equality of parameters necessary to cancel the leading one-loop quantum corrections to the Higgs mass
We present a model wherein the Higgs mass is protected from the quadratic one-loop top quark corrections by scalar particles that are complete singlets under the Standard Model (SM) gauge group
Before deriving the complete expression of one-loop Coleman-Weinberg (CW) [11] potential for general parameters, we show the protection of the Higgs mass in the limit m → M (∆ → 0)
Summary
We extend a supersymmetric SM by adding two copies of a “hidden” top quark sector, which we label B and C, with A labeling the SM sector. The hidden tops are not charged under the SM color but carry hidden colors of SU(3)B and SU(3)C respectively Both SU(2) doublet and singlet hidden tops have mirror partners and form vector-like pairs. The couplings with the (up-type) Higgs respect a Z3 symmetry, which relates the three SU(3) gauge groups. The supersymmetric vector-like mass terms M and ω of the hidden sectors softly break Z3 to Z2. The opposite-sign, equal-magnitude soft mass terms ensure the Higgs potential from the top sectors is calculable and finite. The soft SUSY-breaking masses raise the colored stop masses and lower the masses of ucB and ucC. All other fields can receive subleading SUSY-breaking masses of a few hundred GeV which split the fermions and bosons in the supermultiplets, without spoiling naturalness
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