Supercompositeness from superstrings

Dimopoulos, P.; Leontaris, G.K.; Tracas, N.D.

doi:10.1007/s002880050557

Cited by 4 publications

(8 citation statements)

References 24 publications

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“…As recently suggested in Ref. [47], such states can in principle serve as "preons" which may bind together under the influence of hidden-sector gauge interactions in order to form effective adjoint Higgs representations. We shall discuss the appearance of fractionally charged string states in Sect.…”

Section: String Gut Models Without Higher Levels?mentioning

confidence: 93%

String theory and the path to unification: A review of recent developments

Dienes¹

1997

Physics Reports

296

298

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This is a pedagogical review article surveying the various approaches towards understanding gauge coupling unification within string theory. As is well known, one of the major problems confronting string phenomenology has been an apparent discrepancy between the scale of gauge coupling unification predicted within string theory, and the unification scale expected within the framework of the Minimal Supersymmetric Standard Model (MSSM). In this article, I provide an overview of the different approaches that have been taken in recent years towards reconciling these two scales, and outline some of the major recent developments in each. These approaches include string GUT models; higher affine levels and non-standard hypercharge normalizations; heavy string threshold corrections; light supersymmetric thresholds; effects from intermediate-scale gauge and matter structure beyond the MSSM; strings without supersymmetry; and strings at strong coupling. *

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Section: String Gut Models Without Higher Levels?mentioning

confidence: 93%

String theory and the path to unification: A review of recent developments

Dienes¹

1997

Physics Reports

296

298

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“…It is the latter possibility where generation flow, as discussed in Section 3, can be important. 9 In practice, when determining the number of generations, one looks at the tree-level predictions. However, as discussed in Sections 2 and 3, the number of generations obtained this way may differ from the true number of chiral generations in the low-energy effective theory.…”

Section: 3 Generation Flowmentioning

confidence: 99%

Generation flow in field theory and strings

Ramos-Sanchez,

Ratz,

Shirman

et al. 2021

Preprint

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Nontrivial strong dynamics often leads to the appearance of chiral composites. In phenomenological applications, these can either play the role of Standard Model particles or lift chiral exotics by partnering with them in mass terms. As a consequence, the RG flow may change the effective number of chiral generations, a phenomenon we call generation flow. We provide explicit constructions of globally consistent string models exhibiting generation flow. Since such constructions were misclassified in the traditional model searches, our results imply that more care than usually appreciated has to be taken when scanning string compactifications for realistic models.

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“…It is conceivable that more generally chiral exotics can be removed along the lines of section 2 (cf [9]. for an example).…”

mentioning

confidence: 99%