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March 24, 20264 citationsOpen Access

Composite-hybrid inflation anchored to late-time gravity: closure of the exit parameter, minimal holographic portal, and a quantitative bridge between mu_*, muLambda and primordial inflation

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MBMiguel Ángel Moreno Barajas

Key Points

  • This research investigates how late-time gravitational hierarchies affect the observable exit of primordial inflation.
  • Developed a universal effective field theory (EFT) for transitions between vacuum regimes.
  • Analyzed the constraints of a single-field solution versus a hybrid exit mechanism.
  • Evaluated a SU(3)-type nearly conformal inflating sector.
  • Achieved a scalar tilt of n_s = 0.96486 and a tensor-to-scalar ratio of r = 3.52 x 10^-3.
  • Demonstrated a self-consistent closure of the exit parameter under a double-trace gauge portal.
  • Showed compatibility with existing observational data on standard plateau models.

Abstract

Abstract (English) We show that the same microscopic hierarchy that fixes the weakness of gravity in the late-time benchmark of the program also fixes the observable exit of primordial inflation. The inherited input is the two confining scales of the late-time block, mu_* and muLambda, whose ratio defines the intrinsic logarithm N₋₀₌₁₃₀ * = 47. 10. On that basis we construct the universal EFT of a transition between vacuum regimes. We demonstrate that the single-field solution does not reproduce the central value of the scalar tilt and that a hybrid exit is necessary. We close the exit parameter in a minimal viable UV completion: the purely compensating scale piece gives a vanishing exit and is excluded, while a universal double-trace gauge portal, motivated by holography and NDA, self-consistently fixes the required value of the exit parameter. In the minimal realization with a SU (3) -type nearly conformal inflating sector, the model yields nₛ = 0. 96486, r = 3. 52 x 10^-3, small running, negligible local non-Gaussianity, and visible-biased reheating compatible with the current bound on extra radiation. The proposal matches the observational band of standard plateau models, but it does so with less fitting freedom, because the late-time anchoring fixes the relevant number of e-folds and constrains the geometry of the exit. Resumen (Español) Mostramos que la misma jerarquía microscópica que fija la debilidad de la gravedad en el benchmark tardío del programa también fija la salida observable de la inflación primordial. El input heredado son las dos escalas confinantes del bloque tardío, mu_* y muLambda, cuya relación define el logaritmo intrínseco N₋₀₌₁₃₀ * = 47. 10. Sobre esa base construimos la EFT universal de una transición entre regímenes del vacío. Demostramos que la solución de un solo campo no reproduce el valor central del tilt escalar y que la salida híbrida es necesaria. Cerramos el parámetro de salida en una UV mínima viable: la parte puramente compensadora de escala da una salida nula y queda excluida, mientras que un portal gauge universal de tipo doble traza, motivado por holografía y NDA, fija de forma autoconsistente el valor requerido del parámetro de salida. En la realización mínima con sector inflacionario casi conforme de tipo SU (3), el modelo produce nₛ = 0. 96486, r = 3. 52 x 10^-3, running pequeño, no gaussianidad local despreciable y un reheating visible-biased compatible con la cota actual sobre radiación extra. La propuesta empata con la banda observacional de los modelos plateau estándar, pero lo hace con menos libertad de ajuste, porque el anclaje tardío fija el número relevante de e-folds y restringe la geometría de la salida.

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Cite This Study

Miguel Ángel Moreno Barajas (2026) studied this question.

synapsesocial.com/papers/69c22982aeb5a845df0d40efhttps://doi.org/10.5281/zenodo.19169238
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