String phenomenology from a worldsheet perspective

Faraggi, Alon E.

doi:10.1140/epjc/s10052-019-7222-5

Cited by 25 publications

(50 citation statements)

References 93 publications

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“…Our present models might therefore be regarded as deformation of the supersymmetric model, which conforms with the conjecture in ref. [22] that all (2, 0) string compactifications are connected via orbifolds or by interpolations.…”

Section: Introductionmentioning

confidence: 99%

Stable three generation standard-like model from a tachyonic ten dimensional heterotic-string vacuum

Faraggi¹,

Matyas²,

Percival³

2020

Eur. Phys. J. C

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Recently it was proposed that the ten dimensional tachyonic superstring vacua may serve as good starting points for the construction of viable phenomenological models. Such phenomenologically viable models enlarge the space of possible string solutions, and may offer novel insight into some of the outstanding problems in string phenomenology. In this paper we present a three generation standard-like model that may be regarded as a compactification of a ten dimensional tachyonic vacuum. We discuss the features of the model as compared to a similar model that may be regarded as compactification of the ten dimensional SO(16) × SO(16) heterotic-string. We further argue that in the four dimensional model all the geometrical moduli are fixed perturbatively, whereas the dilaton may be fixed by hidden sector non-perturbative effects. *

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Section: Introductionmentioning

confidence: 99%

Stable three generation standard-like model from a tachyonic ten dimensional heterotic-string vacuum

Faraggi¹,

Matyas²,

Percival³

2020

Eur. Phys. J. C

Self Cite

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“…It is a general property of heterotic-string vacua. From a worldsheet perspective, the SVD suggests that all string vacua are connected by interpolations or by orbifolds, but are distinct in the low energy effective field theory [45]. Further insight into the spinor-vector duality is obtained by translating to the bosonic Z 2 × Z 2 representation.…”

Section: Spinor-vector Duality In Heterotic-string Orbifoldsmentioning

confidence: 99%

“…Construction of vacua that descends from the tachyonic ten dimensional vacua amounts to removing the S-vector from the basis generating the models [45,53]. This can be achieved by removing the S-vector entirely from the basis, or by augmenting it with four periodic worldsheet fermions {φ 1,...,4 }, definingS = {ψ 1,2 , χ 1,...,6 |φ 1,...,4 }.…”

Section: Modular Maps and Non-supersymmetric String Vacuamentioning

confidence: 99%

Spinor-Vector Duality and BSM Phenomenology

Faraggi¹

2021

Proceedings of the International Conference on Beyond Standard Model: From Theory to Experiment

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Spinor-Vector Duality (SVD) has been observed in worldsheet constructions of heterotic-string compactifications. Recently, its realisation in the effective field theory limit of string vacua in six and five dimensions has been investigated. The SVD has been used to construct a string model that allows for an extra family universal U(1), with the standard E 6 embedding of its charges, to remain unbroken down to low scales. Anomaly cancellation of the extra U(1) charges mandates the existence of additional matter states at the extra U(1) breaking scale, which affects precision measurements of Standard Model parameters. I discuss the construction of non-supersymmetric sting vacua and "modular maps" akin to the spacetime supersymmetry map. Such "modular maps" provide a glimpse into the enormous symmetry structure underlying the entire space of perturbative string vacua that is yet to be uncovered.

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“…The SVD arises from the breaking of the (2,2) worldsheet supersymmetry to (2,0), and is a general property of heterotic-string vacua. From a worldsheet perspective, the SVD suggests that all string vacua are connected by interpolations or by orbifolds, but are distinct in the low energy effective field theory [34]. Another important result from the free fermionic classification approach is the discovery of exophobic string vacua [29].…”

Section: Pos(corfu2019)109mentioning

confidence: 99%

“…The SO (16) × E 8 vacuum is produced in the fermionic language by the basis vectors {1, z 1 } from eq. (4.4), irrespective of the choices of the GGSO phases [34]. The tachyon in this model is obtained by acting on the right-moving vacuum with a single fermionic oscillator: ,4 } and additional z i basis vectors with four periodic worldsheet fermionic and utmost two overlapping periodic fermions.…”

Section: Pos(corfu2019)109mentioning

confidence: 99%

Novel Perspectives in String Phenomenology

Faraggi¹

2020

Proceedings of Corfu Summer Institute 2019 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2019)

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String theory is the leading contemporary framework to explore the synthesis of quantum mechanics with gravity. String phenomenology aims to study string theory while maintaining contact with observational data. The fermionic Z 2 × Z 2 orbifold provides a case study that yielded a rich space of phenomenological models. String theory in ten dimensions gives rise to non-supersymmetric tachyonic vacua that may serve as good starting points for the construction of phenomenologically viable models. I discuss an example of such a three generation standard-like model in which all the moduli, aside from the dilaton, are frozen. The Möbius symmetry may turn out to play a central role in the synthesis of quantum mechanics and gravity. In a local version it plays a central role in string theory. In a global version it underlies the Equivalence Postulate of Quantum Mechanics (EPOQM) formalism, which implies that spatial space is compact. It was recently proposed that evidence that the universe is closed exists in the Cosmic Microwave Background Radiation [1, 2].

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String phenomenology from a worldsheet perspective

Cited by 25 publications

References 93 publications

Stable three generation standard-like model from a tachyonic ten dimensional heterotic-string vacuum

Stable three generation standard-like model from a tachyonic ten dimensional heterotic-string vacuum

Spinor-Vector Duality and BSM Phenomenology

Novel Perspectives in String Phenomenology

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