Big bang nucleosynthesis constraints on universal extra dimensions and varying fundamental constants

B. Li; M. -C. Chu

doi:10.1103/physrevd.73.025004

Searching for space-time variation of the fine structure constant using QSO spectra: overview and future prospects

Proceedings of the International Astronomical Union ◽

10.1017/s1743921310009440 ◽

2009 ◽

Vol 5 (H15) ◽

pp. 304-304

Author(s):

J. C. Berengut ◽

V. A. Dzuba ◽

V. V. Flambaum ◽

J. A. King ◽

M. G. Kozlov ◽

...

Keyword(s):

Nuclear Reactor ◽

Structure Constant ◽

Big Bang ◽

The Other ◽

Fine Structure Constant ◽

Spatial And Temporal Variation ◽

Fundamental Constants ◽

Future Prospects ◽

Big Bang Nucleosynthesis ◽

The Universe

Current theories that seek to unify gravity with the other fundamental interactions suggest that spatial and temporal variation of fundamental constants is a possibility, or even a necessity, in an expanding Universe. Several studies have tried to probe the values of constants at earlier stages in the evolution of the Universe, using tools such as big-bang nucleosynthesis, the Oklo natural nuclear reactor, quasar absorption spectra, and atomic clocks (see, e.g. Flambaum & Berengut (2009)).

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Big Bang nucleosynthesis as a probe of varying fundamental “constants”

10.1063/1.2823807 ◽

2007 ◽

Author(s):

Thomas Dent ◽

Steffen Stern ◽

Christof Wetterich ◽

Arttu Rajantie ◽

Carlo Contaldi ◽

...

Keyword(s):

Big Bang ◽

Fundamental Constants ◽

Big Bang Nucleosynthesis

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SPACE-TIME VARIATION OF COUPLING CONSTANTS AND FUNDAMENTAL MASSES

International Journal of Modern Physics A ◽

10.1142/s0217751x0904693x ◽

2009 ◽

Vol 24 (18n19) ◽

pp. 3342-3353 ◽

Cited By ~ 10

Author(s):

V. V. FLAMBAUM ◽

J. C. BERENGUT

Keyword(s):

Structure Constant ◽

Big Bang ◽

Coupling Constants ◽

Fine Structure Constant ◽

Fundamental Constants ◽

Big Bang Nucleosynthesis ◽

Temporal And Spatial Variation ◽

Physical Systems ◽

Temporal And Spatial ◽

The Universe

We review recent works discussing the effects of variation of fundamental "constants" on a variety of physical systems. These are motivated by theories unifying gravity with other interactions that suggest the possibility of temporal and spatial variation of the fundamental constants in an expanding Universe. The effects of any potential variation of the fine-structure constant and fundamental masses could be seen in phenomena covering the lifespan of the Universe, from Big Bang nucleosynthesis to quasar absorption spectra to modern atomic clocks. We review recent attempts to find such variations and discuss some of the most promising new systems where huge enhancements of the effects may occur.

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A Scale at 10 MeV, Gravitational Topological Vacuum, and Large Extra Dimensions

Universe ◽

10.3390/universe4070080 ◽

2018 ◽

Vol 4 (7) ◽

pp. 80

Author(s):

Ufuk Aydemir

Keyword(s):

Thermal History ◽

Extra Dimensions ◽

Weak Interactions ◽

Large Extra Dimensions ◽

Big Bang ◽

Length Scale ◽

Big Bang Nucleosynthesis ◽

History Of ◽

The Universe ◽

Bonnet Term

We discuss a possible scale of gravitational origin at around 10 MeV, or 10−12 cm, which arises in the MacDowell–Mansouri formalism of gravity due to the topological Gauss–Bonnet term in the action, as pointed out by Bjorken several years ago. A length scale of the same size emerges also in the Kodama solution in gravity, which is known to be closely related to the MacDowell–Mansouri formulation. We particularly draw attention to the intriguing incident that the existence of six compact extra dimensions originated from TeV-scale quantum gravity as well points to a length scale of 10−12 cm, as the compactification scale. The presence of six such extra dimensions is also in remarkable consistency with the MacDowell–Mansouri formalism; it provides a possible explanation for the factor of ∼10120 multiplying the Gauss–Bonnet term in the action. We also comment on the relevant implications of such a scale regarding the thermal history of the universe motivated by the fact that it is considerably close to 1–2 MeV below which the weak interactions freeze out, leading to Big Bang Nucleosynthesis.

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Big bang nucleosynthesis as a probe of fundamental ‘constants’

Journal of Physics G Nuclear and Particle Physics ◽

10.1088/0954-3899/35/1/014005 ◽

2007 ◽

Vol 35 (1) ◽

pp. 014005 ◽

Cited By ~ 5

Author(s):

Thomas Dent ◽

Steffen Stern ◽

Christof Wetterich

Keyword(s):

Big Bang ◽

Fundamental Constants ◽

Big Bang Nucleosynthesis

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A Scale at 10 MeV, Gravitational Topological Vacuum, and Large Extra Dimensions

10.20944/preprints201806.0349.v1 ◽

2018 ◽

Author(s):

Ufuk Aydemir

Keyword(s):

Thermal History ◽

Extra Dimensions ◽

Weak Interactions ◽

Large Extra Dimensions ◽

Big Bang ◽

Length Scale ◽

Big Bang Nucleosynthesis ◽

History Of ◽

The Universe ◽

Bonnet Term

We discuss a possible scale of gravitational origin at around 10 MeV, or 10−12 cm, arisen in the MacDowell-Mansouri formalism of gravity due to the topological Gauss-Bonnet term in the action, pointed out by Bjorken several years ago. A length scale of the same size emerges also in the Kodama solution in gravity, which is known to be closely related to the MacDowell-Mansouri formulation. We particularly draw attention to the intriguing incident that existence of six compact extra dimensions originated from TeV-scale quantum gravity as well points to a length scale of 10−12 cm, as the compactification scale. The presence of six such extra dimensions is also in remarkable consistency with the MacDowell-Mansouri formalism; it provides a possible explanation for the factor of ~10120 multiplying the Gauss-Bonnet term in the action. We also comment on the relevant implications of such a scale regarding the thermal history of the universe motivated by the fact that it is considerably close to 1–2 MeV below which the weak interactions freeze out, leading to Big Bang Nucleosynthesis.

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A Scale at 10 MeV, Gravitational Topological Vacuum, and Large Extra Dimensions

10.20944/preprints201806.0349.v2 ◽

2018 ◽

Author(s):

Ufuk Aydemir

Keyword(s):

Thermal History ◽

Extra Dimensions ◽

Weak Interactions ◽

Large Extra Dimensions ◽

Big Bang ◽

Length Scale ◽

Big Bang Nucleosynthesis ◽

History Of ◽

The Universe ◽

Bonnet Term

We discuss a possible scale of gravitational origin at around 10 MeV, or 10−12 cm, which arises in the MacDowell-Mansouri formalism of gravity due to the topological Gauss-Bonnet term in the action, as pointed out by Bjorken several years ago.~A length scale of the same size emerges also in the Kodama solution in gravity, which is known to be closely related to the MacDowell-Mansouri formulation. We particularly draw attention to the intriguing incident that existence of six compact extra dimensions originated from TeV-scale quantum gravity as well points to a length scale of 10−12 cm, as the compactification scale. The presence of six such extra dimensions is also in remarkable consistency with the MacDowell-Mansouri formalism; it provides a possible explanation for the factor of ~10120 multiplying the Gauss-Bonnet term in the action. We also comment on the relevant implications of such a scale regarding the thermal history of the universe motivated by the fact that it is considerably close to 1–2 MeV below which the weak interactions freeze out, leading to Big Bang Nucleosynthesis.

Download Full-text