Publications

BICEP/Keck Constraints on Attractor Models of Inflation and Reheating

Recent BICEP/Keck data on the cosmic microwave background, in combination with previous WMAP and Planck data, impose strong new …
John Ellis, Marcos A. G. García, Dimitri V. Nanopoulos, Keith A. Olive, Sarunas Verner
Preprint

Freeze-in from Preheating

We consider the production of dark matter during the process of reheating after inflation. The relic density of dark matter from …
Marcos A. G. García, Kunio Kaneta, Yann Mambrini, Keith A. Olive, Sarunas Verner
Preprint

Slow and Safe Gravitinos

It has been argued that supergravity models of inflation with vanishing sound speeds, $c_s$, lead to an unbounded growth in the …
Emilian Dudas, Marcos A. G. García, Yann Mambrini, Keith A. Olive, Marco Peloso, Sarunas Verner
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On the Realization of WIMPflation

We consider models for inflation with a stable inflaton. Reheating is achieved through scattering processes such as …
Marcos A. G. García, Yann Mambrini, Keith A. Olive, Sarunas Verner
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Reheating and Dark Matter Production

A concise summary of out-of-equilibrium dark matter production during post-inflationary reheating is presented. We show that the dark …
Marcos A. G. García
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Inflaton Oscillations and Post-Inflationary Reheating

We analyze in detail the perturbative decay of the inflaton oscillating about a generic form of its potential $V(\phi) = \phi^k$, …
Marcos A. G. García, Kunio Kaneta, Yann Mambrini, Keith A. Olive
Preprint DOI

How warm are non-thermal relics? Lyman-$\alpha$ bounds on out-of-equilibrium dark matter

We investigate the power spectrum of Non-Cold Dark Matter (NCDM) produced in a state out of thermal equilibrium. We consider dark …
Guillermo Ballesteros, Marcos A. G. García, Mathias Pierre
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Building Models of Inflation in No-Scale Supergravity

After reviewing the motivations for cosmological inflation formulated in the formalism of supersymmetry, we argue that the appropriate …
John Ellis, Marcos A. G. García, Natsumi Nagata, Dimitri V. Nanopoulos, Keith A. Olive, Sarunas Verner
Preprint DOI

Case for decaying spin- 3/2 dark matter

We couple a sterile neutrino sector to a spin-3/2 particle and show that with a Planck reduced coupling, we can obtain a sufficiently …
Marcos A. G. García, Yann Mambrini, Keith A. Olive, Sarunas Verner
Preprint DOI

A non-perturbative approach to the scalar Casimir effect with Lorentz symmetry violation

We determine the effect of Lorentz invariance violation in the vacuum energy and stress between two parallel plates separated by a …
Carlos A. Escobar, A. Martín-Ruiz, O. J. Franca, Marcos A. G. García
Preprint DOI

Reheating and Post-inflationary Production of Dark Matter

We perform a systematic analysis of dark matter production during post-inflationary reheating. Following the period of exponential …
Marcos A. G. García, Kunio Kaneta, Yann Mambrini, Keith A. Olive
Preprint DOI

Proton Decay: Flipped vs Unflipped SU(5)

We analyze nucleon decay modes in a no-scale supersymmetric flipped SU(5) GUT model, and contrast them with the predictions for proton …
John Ellis, Marcos A. G. García, Natsumi Nagata, Dimitri V. Nanopoulos, Keith A. Olive
Preprint DOI

Curvature Perturbations From Stochastic Particle Production During Inflation

We calculate the curvature power spectrum sourced by spectator fields that are excited repeatedly and non-adiabatically during …
Marcos A. G. Garcia, Mustafa A. Amin, Daniel Green
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Superstring-Inspired Particle Cosmology: Inflation, Neutrino Masses, Leptogenesis, Dark Matter & the SUSY Scale

We develop a string-inspired model for particle cosmology, based on a flipped SU(5)$\times$U(1) gauge group formulated in a no-scale …
John Ellis, Marcos A. G. García, Natsumi Nagata, Dimitri V. Nanopoulos, Keith A. Olive
Preprint DOI

Cosmology with a Master Coupling in Flipped SU(5) $\times$ U(1): the $\lambda_6$ Universe

We propose a complete cosmological scenario based on a flipped SU(5)$\times$U(1) GUT model that incorporates Starobinsky-like …
John Ellis, Marcos A. G. García, Natsumi Nagata, Dimitri V. Nanopoulos, Keith A. Olive
Preprint DOI

Messengers from the Early Universe: Cosmic Neutrinos and Other Light Relics

The hot dense environment of the early universe is known to have produced large numbers of baryons, photons, and neutrinos. These …
Daniel Green, others
Preprint

Stochastic Particle Production in a de Sitter Background

We explore non-adiabatic particle production in a de Sitter universe for a scalar spectator field, by allowing the effective mass …
Marcos A. G. García, Mustafa A. Amin, Scott G. Carlsten, Daniel Green
Preprint DOI

Symmetry Breaking and Reheating after Inflation in No-Scale Flipped SU(5)

No-scale supergravity and the flipped SU(5)$\times$U(1) gauge group provide an ambitious prototype string-inspired scenario for physics …
John Ellis, Marcos A. G. Garcia, Natsumi Nagata, Dimitri V. Nanopoulos, Keith A. Olive
Preprint DOI

Prethermalization production of dark matter

At the end of inflation, the inflaton field decays into an initially non-thermal population of relativistic particles which eventually …
Marcos A. G. Garcia, Mustafa A. Amin
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Gravitational Wave Emission from Collisions of Compact Scalar Solitons

We numerically investigate the gravitational waves generated by the head-on collision of equal-mass, self-gravitating, real scalar …
Thomas Helfer, Eugene A. Lim, Marcos A. G. García, Mustafa A. Amin
Preprint DOI

Enhancement of the Dark Matter Abundance Before Reheating: Applications to Gravitino Dark Matter

In the first stages of inflationary reheating, the temperature of the radiation produced by inflaton decays is typically higher than …
Marcos A. G. García, Yann Mambrini, Keith A. Olive, Marco Peloso
Preprint DOI

Multifield Stochastic Particle Production: Beyond a Maximum Entropy Ansatz

We explore non-adiabatic particle production for $N_{\rm f}$ coupled scalar fields in a time-dependent background with stochastically …
Mustafa A. Amin, Marcos A. G. García, Hong-Yi Xie, Osmond Wen
Preprint DOI

Starobinsky-like Inflation, Supercosmology and Neutrino Masses in No-Scale Flipped SU(5)

We embed a flipped ${\rm SU(5)}\times {\rm U(1)}$ GUT model in a no-scale supergravity framework, and discuss its predictions for …
John Ellis, Marcos A. G. García, Natsumi Nagata, Dimitri V. Nanopoulos, Keith A. Olive
Preprint DOI

Starobinsky-Like Inflation and Neutrino Masses in a No-Scale SO(10) Model

Using a no-scale supergravity framework, we construct an SO(10) model that makes predictions for cosmic microwave background …
John Ellis, Marcos A. G. Garcia, Natsumi Nagata, Dimitri V. Nanopoulos, Keith A. Olive
Preprint DOI

Post-Inflationary Gravitino Production Revisited

We revisit gravitino production following inflation. As a first step, we review the standard calculation of gravitino production in the …
John Ellis, Marcos A. G. García, Dimitri V. Nanopoulos, Keith A. Olive, Marco Peloso
Preprint DOI

No-Scale Inflation

Supersymmetry is the most natural framework for physics above the TeV scale, and the corresponding framework for early-Universe …
John Ellis, Marcos A. G. García, Dimitri V. Nanopoulos, Keith A. Olive
Preprint DOI

Calculations of Inflaton Decays and Reheating: with Applications to No-Scale Inflation Models

We discuss inflaton decays and reheating in no-scale Starobinsky-like models of inflation, calculating the effective equation-of-state …
John Ellis, Marcos A. G. García, Dimitri V. Nanopoulos, Keith A. Olive
Preprint DOI

The Full CPT-Even Photon Sector of the Standard Model Extension at Finite Temperature

We study the finite temperature behavior of the CPT-even pure-photon sector of the Standard Model Extension, which is defined by the …
Carlos A. Escobar, Marcos A. G. García
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Phenomenological Aspects of No-Scale Inflation Models

We discuss phenomenological aspects of inflationary models with a no-scale supergravity Kähler potential motivated by compactified …
John Ellis, Marcos A. G. Garcia, Dimitri V. Nanopoulos, Keith A. Olive
Preprint DOI

Two-Field Analysis of No-Scale Supergravity Inflation

Since the building-blocks of supersymmetric models include chiral superfields containing pairs of effective scalar fields, a two-field …
John Ellis, Marcos A. G. Garcia, Dimitri V. Nanopoulos, Keith A. Olive
Preprint DOI

Resurrecting Quadratic Inflation in No-Scale Supergravity in Light of BICEP2

The magnitude of primordial tensor perturbations reported by the BICEP2 experiment is consistent with simple models of chaotic …
John Ellis, Marcos A. G. Garcia, Dimitri V. Nanopoulos, Keith A. Olive
Preprint DOI

A No-Scale Inflationary Model to Fit Them All

The magnitude of B-mode polarization in the cosmic microwave background as measured by BICEP2 favours models of chaotic inflation with …
John Ellis, Marcos A. G. Garcia, Dimitri V. Nanopoulos, Keith A. Olive
Preprint DOI

The Moduli and Gravitino (non)-Problems in Models with Strongly Stabilized Moduli

In gravity mediated models and in particular in models with strongly stabilized moduli, there is a natural hierarchy between gaugino …
Jason L. Evans, Marcos A. G. García, Keith A. Olive
Preprint DOI

Affleck-Dine Baryogenesis and Inflation in Supergravity with Strongly Stabilized Moduli

Constructing models of inflation and/or baryogenesis in the context of $N=1$ supergravity is known to be difficult as the finite energy …
Marcos A. G. García, Keith A. Olive
Preprint DOI

The quantum $H_4$ integrable system

The quantum $H_4$ integrable system is a 4D system with rational potential related to the non-crystallographic root system $H_4$ with …
Marcos A. G. García, Alexander V. Turbiner
Preprint DOI

Sutherland-type Trigonometric Models, Trigonometric Invariants and Multivariate Polynomials. III. $E_8$ case

It is shown that the $E_8$ trigonometric Olshanetsky-Perelomov Hamiltonian, when written in terms of the Fundamental Trigonometric …
K. G. Boreskov, A. V. Turbiner, J. C. Lopez Vieyra, M. A. G. Garcia
Preprint DOI

The quantum $H_3$ integrable system

The quantum $H_3$ integrable system is a 3D system with rational potential related to the non-crystallographic root system $H_3$. It is …
Marcos A. G. García, Alexander V Turbiner
Preprint DOI

Sutherland-type trigonometric models, trigonometric invariants and multivariable polynomials. II: $E_7$ case

It is shown that the $E_7$ trigonometric Olshanetsky-Perelomov Hamiltonian, when written in terms of the Fundamental Trigonometric …
J. C. Lopez Vieyra, M. A. G. García, A. V. Turbiner
Preprint DOI