Folded supersymmetry with a twist

Cohen, Timothy; Craig, Nathaniel; Lou, Hou Keong; Pinner, David

doi:10.1007/jhep03(2016)196

Cited by 21 publications

(31 citation statements)

References 65 publications

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“…This horizontal Uð1Þ symmetry is thus nontrivially "entwined" with the same physics that renders the theory nonsupersymmetric and also breaks the GUT symmetry. In this connection, we note that entwined SUSY is reminiscent of the so-called "folded SUSY" framework [5,6] in which would-be superpartners have different SUð3Þ charges. Indeed, it might even be possible to incorporate folded SUSY or its variants into our construction.…”

Section: Introductionmentioning

confidence: 92%

GUT precursors and entwined SUSY: The phenomenology of stable nonsupersymmetric strings

Abel

Mavroudi

2018

Phys. Rev. D

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Recent work has established a method of constructing nonsupersymmetric string models that are stable, with near-vanishing one-loop dilaton tadpoles and cosmological constants. This opens up the tantalizing possibility of realizing stable string models whose low-energy limits directly resemble the Standard Model rather than one of its supersymmetric extensions. In this paper we consider the general structure of such strings and find that they share two important phenomenological properties. The first is a so-called "GUT-precursor" structure in which new GUT-like states appear with masses that can be many orders of magnitude lighter than the scale of gauge coupling unification. These states allow a parametrically large compactification volume, even in weakly coupled heterotic strings, and in certain regions of parameter space can give rise to dramatic collider signatures which serve as "smoking guns" for this overall string framework. The second is a residual "entwined-SUSY" (or e-SUSY) structure for the matter multiplets in which different multiplet components carry different horizontal Uð1Þ charges. As a concrete example and existence proof of these features, we present a heterotic string model that contains the fundamental building blocks of the Standard Model such as the Standard-Model gauge group, complete chiral generations, and Higgs fields-all without supersymmetry. Even though massless gravitinos and gauginos are absent from the spectrum, we confirm that this model has an exponentially suppressed one-loop dilaton tadpole and displays both the GUT-precursor and e-SUSY structures. We also discuss some general phenomenological properties of e-SUSY, such as cancellations in radiative corrections to scalar masses, the possible existence of a corresponding approximate moduli space, and the prevention of rapid proton decay.

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Section: Introductionmentioning

confidence: 92%

GUT precursors and entwined SUSY: The phenomenology of stable nonsupersymmetric strings

Abel

Mavroudi

2018

Phys. Rev. D

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“…Together with the naturalness condition Eq. (37), this leads to a quadratically divergent two-loop contribution to the Higgs mass:…”

Section: Experimental Signatures and Tuningmentioning

confidence: 99%

Towards a no-lose theorem for naturalness

Curtin

Saraswat

2016

Phys. Rev. D

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We derive a phenomenological no-lose theorem for naturalness up to the TeV scale, which applies when quantum corrections to the Higgs mass from top quarks are canceled by perturbative BSM particles (top partners) of similar multiplicity due to to some symmetry. Null results from LHC searches already seem to disfavor such partners if they are colored. Any partners with SM charges and ∼ TeV masses will be exhaustively probed by the LHC and a future 100 TeV collider. Therefore, we focus on neutral top partners. While these arise in Twin Higgs theories, we analyze neutral top partners as model-independently as possible using EFT and Simplified Model methods. We classify all perturbative neutral top partner structures in order to compute their irreducible lowenergy signatures at proposed future lepton and hadron colliders, as well as the irreducible tunings suffered in each scenario. Central to our theorem is the assumption that SM-charged BSM states appear in the UV completion of neutral naturalness, which is the case in all known examples. Direct production at the 100 TeV collider then allows this scale to be probed at the ∼10 TeV level. We find that proposed future colliders probe any such scenario of naturalness with tuning of 10% or better. This provides very strong model-independent motivation for both new lepton and hadron colliders, which in tandem act as discovery machines for general naturalness. We put our results in context by discussing other possibilities for naturalness, including "swarms" of top partners, inherently non-perturbative or exotic physics, or theories without SM-charged states in the UV completion. Realizing a concrete scenario which avoids our arguments while still lacking experimental signatures remains an open model-building challenge.

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“…Here, we both fold and hypertwist SUSY (to be distinguished from the twist in Ref. [30]) to give the top partner an arbitrary electric charge. For the case of spin-1/2 top partners, we explore hypertwisted composite Higgs models.…”

Section: Introductionmentioning

confidence: 99%

Colorful Twisted Top Partners and Partnerium at the LHC

Kats

McCullough

Pérez

et al. 2017

J. High Energ. Phys.

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In scenarios that stabilize the electroweak scale, the top quark is typically accompanied by partner particles. In this work, we demonstrate how extended stabilizing symmetries can yield scalar or fermionic top partners that transform as ordinary color triplets but carry exotic electric charges. We refer to these scenarios as "hypertwisted" since they involve modifications to hypercharge in the top sector. As proofs of principle, we construct two hypertwisted scenarios: a supersymmetric construction with spin-0 top partners, and a composite Higgs construction with spin-1/2 top partners. In both cases, the top partners are still phenomenologically compatible with the mass range motivated by weak-scale naturalness. The phenomenology of hypertwisted scenarios is diverse, since the lifetimes and decay modes of the top partners are model dependent. The novel coupling structure opens up search channels that do not typically arise in top-partner scenarios, such as pair production of top-plus-jet resonances. Furthermore, hypertwisted top partners are typically sufficiently long lived to form "top-partnerium" bound states that decay predominantly via annihilation, motivating searches for rare narrow resonances with diboson decay modes.

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Folded supersymmetry with a twist

Cited by 21 publications

References 65 publications

GUT precursors and entwined SUSY: The phenomenology of stable nonsupersymmetric strings

GUT precursors and entwined SUSY: The phenomenology of stable nonsupersymmetric strings

Towards a no-lose theorem for naturalness

Colorful Twisted Top Partners and Partnerium at the LHC

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