Large density perturbations from reheating to standard model particles due to the dynamics of the Higgs boson during inflation

Litsa, Aliki; Freese, Katherine; Sfakianakis, Evangelos I.; Stengel, Patrick; Visinelli, Luca

doi:10.1103/physrevd.104.123546

Cited by 9 publications

(14 citation statements)

References 78 publications

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“…While this is in principle allowed by cosmological probes, which only require T rh ≳ 5 MeV [149], realizing it in practice from the particle point of view is more challenging (for instance, it is unclear whether electroweak symmetry breaking can proceed successfully as usual, although on the other hand such a scenario may facilitate the generation of a baryon asymmetry). Finally, it is worth noting that the reheating scale can be lowered even in the absence of new physics, through effects such as "Higgs blocking" [355][356][357].…”

Section: Resultsmentioning

confidence: 99%

Inflationary interpretation of the stochastic gravitational wave background signal detected by pulsar timing array experiments

Vagnozzi

2023

Journal of High Energy Astrophysics

108

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Section: Resultsmentioning

confidence: 99%

Inflationary interpretation of the stochastic gravitational wave background signal detected by pulsar timing array experiments

Vagnozzi

2023

Journal of High Energy Astrophysics

108

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“…This way we are later on able to constrain parameter space in a much more computationally efficient way. The actual perturbation distributions are calculated in our companion paper [29] with the purpose of deriving the corresponding non-gaussianity of the temperature anisotropy spectrum.…”

Section: B Perturbed Equationsmentioning

confidence: 99%

Large Density Perturbations from Reheating to Standard Model particles due to the Dynamics of the Higgs Boson during Inflation

Litsa,

Freese,

Sfakianakis

et al. 2020

Preprint

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Cosmic Microwave Background (CMB) observations are used to constrain reheating to Standard Model (SM) particles after a period of inflation. As a light spectator field, the SM Higgs boson acquires large field values from its quantum fluctuations during inflation, gives masses to SM particles that vary from one Hubble patch to another, and thereby produces large density fluctuations. We consider both perturbative and resonant decay of the inflaton to SM particles. For the case of perturbative decay from coherent oscillations of the inflaton after high scale inflation, we find strong constraints on the reheat temperature for the inflaton decay into heavy SM particles. For the case of resonant particle production (preheating) to (Higgsed) SM gauge bosons, we find temperature fluctuations larger than observed in the CMB for a range of gauge coupling that includes those found in the SM and conclude that such preheating cannot be the main source of reheating the Universe after inflation.

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“…More generally, early universe inflationary cosmology has risen to the fore of particle physics, in particular, under the banner of Cosmological Collider Physics [20][21][22], and the Cosmological Bootstrap Program [23][24][25], with the hope that one may use the cosmic microwave background non-Gaussianity as a particle detector [21,26,27,27,28]. Complementary to this, reheating as Cosmological Heavy Ion Collider [29], namely, reheating as a playground in which to study thermalization in quantum field theory, has seen a recent resurgence [29][30][31][32][33], as has reheating as a testing ground for Higgs physics [34]. With the rise of cosmology as a particle physics laboratory, it is natural to continue the study of gravitational particle production and of inflation as a particle factory; the B-factory to the Cosmological Collider's LHC.…”

Section: Introductionmentioning

confidence: 99%

Catastrophic Production of Slow Gravitinos

Kolb,

Long,

McDonough

2021

Preprint

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We study gravitational particle production of the massive spin-3/2 Rarita-Schwinger field, and its close relative, the gravitino, in FRW cosmological spacetimes. For masses lighter than the value of the Hubble expansion rate after inflation, m 3/2 H, we find catastrophic gravitational particle production, wherein the number of gravitationally produced particles is divergent, caused by a transient vanishing of the helicity-1/2 gravitino sound speed. In contrast with the conventional gravitino problem, the spectrum of produced particles is dominated by those with momentum at the UV cutoff. This suggests a breakdown of effective field theory, which might be cured by new degrees of freedom that emerge in the UV. We study the UV completion of the Rarita-Schwinger field, namely N = 1, d = 4, supergravity. We reproduce known results for models with a single superfield and models with an arbitrary number of chiral superfields, find a simple geometric expression for the sound speed in the latter case, and extend this to include nilpotent constrained superfields and orthogonal constrained superfields. We find supergravity models where the catastrophe is cured and models where it persists. Insofar as quantizing the gravitino is tantamount to quantizing gravity, as is the case in any UV completion of supergravity, the models exhibiting catastrophic production are prime examples of 4dimensional effective field theories that become inconsistent when gravity is quantized, suggesting a possible link to the Swampland program. We propose the Gravitino Swampland Conjecture, which is consistent with and indeed follows from the KKLT and Large Volume scenarios for moduli stabilization in string theory.

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Large density perturbations from reheating to standard model particles due to the dynamics of the Higgs boson during inflation

Cited by 9 publications

References 78 publications

Inflationary interpretation of the stochastic gravitational wave background signal detected by pulsar timing array experiments

Inflationary interpretation of the stochastic gravitational wave background signal detected by pulsar timing array experiments

Large Density Perturbations from Reheating to Standard Model particles due to the Dynamics of the Higgs Boson during Inflation

Catastrophic Production of Slow Gravitinos

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