Three-generation super no-scale models in heterotic superstrings

Florakis, Ioannis; Rizos, John; Violaris-Gountonis, Konstantinos

doi:10.1016/j.physletb.2022.137311

Cited by 5 publications

(2 citation statements)

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“…In the language of the fermionic formulation, this kind of construction corresponds to introducing a discrete torsion [5]. Those non-supersymmetric theories are classified into six types depending on the independent choices of shift vectors of order 2: the SO(16) × SO (16) model, the SO(32) model, the SO(8) × SO (24) model, the U (16) model, the SO( 16) × E 8 model and the (E 7 × SU (2)) 2 model. Among them, only the SO(16) × SO( 16) model is tachyon-free.…”

Section: Introductionmentioning

confidence: 99%

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New non-supersymmetric heterotic string theory with reduced rank and exponential suppression of the cosmological constant

Nakajima¹

2023

Preprint

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We study the heterotic asymmetric orbifold model in which supersymmetry is broken by the stringy Schark-Schwarz mechanism. This model is a natural non-supersymmetric extension of CHL strings and can also be interpreted as the interpolating model between the E 8 × E ′ 8 theory and the non-supersymmetric E 8 theory. The enhancement of gauge groups, of which the rank is reduced to 8 + d, is explored. In particular, the enhancement to non-simply-laced groups is possible with d ≥ 2, as well as in the CHL model. We also give the conditions that the massless matter spectrum must satisfy. Moreover, the one-loop cosmological constant is evaluated in the regime where supersymmetry is asymptotically restored, and we show that the exponential suppression can occur unless d = 1.

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Section: Introductionmentioning

confidence: 99%

“…Such models are preferred when a top-down scenario with highenergy supersymmetry breaking is considered (e.g. see [22][23][24][25][26][27]). A reason for that is that in the regime with supersymmetry restored, the asymptotic behavior of one-loop cosmological constant takes the form [17,28] 2…”

Section: Introductionmentioning

confidence: 99%