Primordial black hole production in Critical Higgs Inflation
By J. Ezquiaga, Juan García-Bellido, E. Morales. 2017
283 citations recorded by the source corpus.
Abstract Primordial Black Holes (PBH) arise naturally from high peaks in the curvature power spectrum of near-inflection-point single-field inflation, and could constitute today the dominant component of the dark matter in the universe. In this letter we explore the possibility that a broad spectrum of PBH is formed in models of Critical Higgs Inflation (CHI), where the near-inflection point is related to the critical value of the RGE running of both the Higgs self-coupling λ ( μ ) and its non-minimal coupling to gravity ξ ( μ ) . We show that, for a wide range of model parameters, a half-domed-shaped peak in the matter spectrum arises at sufficiently small scales that it passes all the constraints from large scale structure observations. The predicted cosmic microwave background spectrum at large scales is in agreement with Planck 2015 data, and has a relatively large tensor-to-scalar ratio that may soon be detected by B-mode polarization experiments. Moreover, the wide peak in the power spectrum gives an approximately lognormal PBH distribution in the range of masses 0.01 – 100 M ⊙ , which could explain the LIGO merger events, while passing all present PBH observational constraints. The stochastic background of gravitational waves coming from the unresolved black-hole-binary mergers could also be detected by LISA or PTA. Furthermore, the parameters of the CHI model are consistent, within 2σ, with the measured Higgs parameters at the LHC and their running. Future measurements of the PBH mass spectrum could allow us to obtain complementary information about the Higgs couplings at energies well above the EW scale, and thus constrain new physics beyond the Standard Model.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/0d0823e6daf1d1ac6aa89bd6e2898605d9b8a7eb
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Citations in the corpus
- Primordial black holes and second order gravitational waves from ultra-slow-roll inflation (2017, background): “The models introduced in [20, 35] avoid the violation of slow-roll and the jump in N at the near inflection point is around ∆N ∼ 30, but the enhancement of the power spectrum is less than 5 orders of magnitude.”
- Higgs Inflation (2018, background): “[115]—but rather assuming it to be constant during inflation.”
- Solar-mass primordial black holes explain NANOGrav hint of gravitational waves (2020, background): “, a locally flat part (an approximate inflection point) [52], a bump, or a dip [53] in the single-field case, corresponding to some physical phenomenon occurring in O(1) e-folding time of the Hubble expansion.”
- Primordial black holes from string inflation (2018, background): “Similarly to previous works on PBH formation in single-field inflation [2, 15], the scalar spectral index turns out to be a bit too red since it is more than 3σ away from the Planck reference value.”
- Primordial black holes from inflation and non-Gaussianity (2018, unknown): “This spectator field can be even the Higgs of the Standard Model [27,28].”
- Primordial Black Holes as Dark Matter: Recent Developments (2020, methodology): “For example, this applies for two-field models like hybrid inflation [29] and even some single-field models like Higgs inflation [287, 288], although this may not apply for the minimal Higgs model [289].”
- The exponential tail of inflationary fluctuations: consequences for primordial black holes (2019, background): “Tilted-inflection point potentials of this class [78, 79] can be constructed by adding a linear slope to our previous cubic potential (3.”
- Primordial black holes from inflation and quantum diffusion (2018, unknown): “[40] and the subsequent discussions in refs.”