Inflation model selection revisited after a 1.91% measurement of the Hubble constant

Guo, Rui-Yun; Zhang, Jingfei; Zhang, Xin

doi:10.1007/s11433-019-1514-0

Cited by 31 publications

(15 citation statements)

References 7 publications

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“…For example, the effects of nonstandard late-time expansion history (related to the so-called H 0 tension) have been discussed in Refs. [374,519,520] and the effects of nonstandard neutrino interactions and presence of extra radiation on inflationary model selection have been discussed in Refs. [521,522,523,524].…”

Section: Constraints On Baryogenesis From Dilution By Reheatingmentioning

confidence: 99%

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

Allahverdi¹,

Amin²,

Berlin³

et al. 2021

TheOJA

194

140

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It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. While the abundance of light elements indicates that the Universe was radiation dominated during Big Bang Nucleosynthesis (BBN), there is scant evidence that the Universe was radiation dominated prior to BBN. It is therefore possible that the cosmological history was more complicated, with deviations from the standard radiation domination during the earliest epochs. Indeed, several interesting proposals regarding various topics such as the generation of dark matter, matter-antimatter asymmetry, gravitational waves, primordial black holes, or microhalos during a nonstandard expansion phase have been recently made. In this paper, we review various possible causes and consequences of deviations from radiation domination in the early Universe -taking place either before or after BBN -and the constraints on them, as they have been discussed in the literature during the recent years.

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Section: Constraints On Baryogenesis From Dilution By Reheatingmentioning

confidence: 99%

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

Allahverdi¹,

Amin²,

Berlin³

et al. 2021

TheOJA

194

140

View full text Add to dashboard Cite

show abstract

“…(ii) In the extended cosmological models (beyond ΛCDM), extra cosmological parameters (from "new physics") cannot be tightly constrained by current cosmological observations, since parameter degeneracies are usually serious. For example, dark-energy equation of state (EoS) w, total neutrino mass m ν , and other extra parameters still cannot be well constrained by the current observations [579][580][581][582][583][584][585][586][587][588][589], due to the strong parameter degeneracies. Since GW standard sirens can measure absolute cosmological distances, they can be used to effectively break the parameter degeneracies existing in the constraints from the traditional EM cosmological observations [590].…”

Section: Standard Sirens Combined With Other Cosmological Probesmentioning

confidence: 99%

The Gravitational-wave physics II: Progress

Bian

Cai

Cao

et al. 2021

Sci. China Phys. Mech. Astron.

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It has been a half-decade since the first direct detection of gravitational waves, which signifies the coming of the era of the gravitational-wave astronomy and gravitational-wave cosmology. The increasing number of the detected gravitational-wave events has revealed the promising capability of constraining various aspects of cosmology, astronomy, and gravity. Due to the limited space in this review article, we will briefly summarize the recent progress over the past five years, but with a special focus on some of our own work for the Key Project "Physics associated with the gravitational waves" supported by the National Natural Science Foundation of China. In particular, (1) we have presented the mechanism of the gravitational-wave production during some physical processes of the early Universe, such as inflation, preheating and phase transition, and the cosmological implications of gravitational-wave measurements; (2) we have put constraints on the neutron star maximum mass according to GW170817 observations; (3) we have developed a numerical relativity algorithm based on the finite element method and a waveform model for the binary black hole coalescence along an eccentric orbit.

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“…Replacing h in Equation ( 16) by using Equation (32), we get Equation (70). Replacing T in Equation ( 70) by using Equation ( 67), we get Equation (71).…”

Section: Different Equations To Calculate Hmentioning

confidence: 99%

A New Physics Would Explain What Looks Like an Irreconcilable Tension between the Values of Hubble Constants and Allows <i>H<sub>0</sub></i> to Be Calculated Theoretically Several Ways

Mercier

2021

JMP

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Observing galaxies receding from each other, Hubble found the universe's expansion in 1929. His law that gives the receding speed as a function of distance implies a factor called Hubble constant H 0 . We want to validate our theoretical value of H 0 ≈ 72.09548580( 32) km·s −1 ·MParsec −1 with a new cosmological model found in 2019. This model predicts what may look like two possible values of H 0 . According to this model, the correct equation of the apparent age of the universe gives ~ 14.14 billion years. In approximation, we get the well-known equation 1/H 0 ≈ 13.56 billion years. When we force these ages to fit the 1/H 0 formula, it gives two different Hubble constant values of ~69.2 and 72.1 km·s −1 ·MParsec −1 . When we apply a theoretical correction factor Keywords Hubble Constant H 0 , Hubble Tension, Age of the Universe How to cite this paper: Mercier, C. (2021) A New Physics Would Explain What Looks Like an Irreconcilable Tension between the Values of Hubble Constants and Allows H0 to Be Calculated Theoretically Several Ways.

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Inflation model selection revisited after a 1.91% measurement of the Hubble constant

Cited by 31 publications

References 7 publications

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

The Gravitational-wave physics II: Progress

A New Physics Would Explain What Looks Like an Irreconcilable Tension between the Values of Hubble Constants and Allows <i>H<sub>0</sub></i> to Be Calculated Theoretically Several Ways

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Inflation model selection revisited after a 1.91% measurement of the Hubble constant

Cited by 31 publications

References 7 publications

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

The Gravitational-wave physics II: Progress

A New Physics Would Explain What Looks Like an Irreconcilable Tension between the Values of Hubble Constants and Allows &lt;i&gt;H&lt;sub&gt;0&lt;/sub&gt;&lt;/i&gt; to Be Calculated Theoretically Several Ways

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A New Physics Would Explain What Looks Like an Irreconcilable Tension between the Values of Hubble Constants and Allows <i>H<sub>0</sub></i> to Be Calculated Theoretically Several Ways