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Progress of Theoretical Physics Supplement, 2002 24 pages, 5 figures, Lectures presented at the First Aegean Summer School on Cosmology, Samos, September 2001 References ...
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Advances in High Energy Physics, Volume 2022, Issue 1, 2022., 2022 In this paper, we have investigated the density perturbations and cosmological evolution in the FLRW universe in the presence of a cosmic magnetic field, which may be assumed to mimic primordial magnetic fields. Such magnetic fields have sufficient strength to influence galaxy formation and cluster dynamics, thereby leaving an imprint on the CMB ...
Samarjit Chakraborty +2 more
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A note on brane cosmology [PDF]
Physics Letters B, 2001 We derive a new class of time-dependent solutions for the Randall-Sundrum model by patching together isometries broken by the brane. Solutions generated by generalized boosts along the fifth dimension are associated with localized gravity and lead to an effective Friedman equation on the brane with a scale factor exhibiting power law or exponential ...
Kehagias, A., Tamvakis, K.
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Some Bianchi Type Viscous Holographic Dark Energy Cosmological Models in the Brans–Dicke Theory
Advances in Astronomy, Volume 2022, Issue 1, 2022., 2022 In this article, we analyze Bianchi type–II, VIII, and IX spatially homogeneous and anisotropic space‐times in the background of the Brans–Dicke theory of gravity within the framework of viscous holographic dark energy. To solve the field equations, we have used the relation between the metric potentials as R = Sn and the relation between the scalar ...
M. Vijaya Santhi +4 more
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Relaxing the W′ Constraint on Compact Extradimension
Advances in High Energy Physics, Volume 2022, Issue 1, 2022., 2022 In this paper, we study the constraint on brane tension and compactification scale for models with brane fluctuations using the results from the direct search of W′ at 13 TeV LHC, with an integrated luminosity of 36.1fb−1, in the case for which branon forms the entire cold dark matter.
Mathew Thomas Arun +1 more
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Journal of High Energy Physics, 2014 19 pages and 8 figures, v2: version published in ...
Bohdan Grzadkowski +3 more
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Inflationary Universe from Anomaly‐Free F(R)‐Gravity
Advances in High Energy Physics, Volume 2022, Issue 1, 2022., 2022 By adding a three‐dimensional manifold to an eleven‐dimensional manifold in supergravity, we obtain the action of F(R)‐gravity and find that it is anomaly‐free. We calculate the scale factor of the inflationary universe in this model and observe that it is related to the slow‐roll parameters.
Aroonkumar Beesham +2 more
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European Physical Journal C: Particles and Fields, 2021 We study cosmological inflation and its dynamics in the framework of the Randall–Sundrum II brane model. In particular, we analyze in detail four representative small-field inflationary potentials, namely Natural inflation, Hilltop inflation, Higgs-like ...
Constanza Osses +2 more
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String (Gravi)photons, “Dark Brane Photons”, Holography and the Hypercharge Portal
Fortschritte der Physik, Volume 69, Issue 6, June 2021., 2021 Abstract The mixing of graviphotons and dark brane photons to the Standard Model hypercharge is analyzed in full generality, in weakly‐coupled string theory. Both the direct mixing as well as effective terms that provide mixing after inclusion of SM corrections are estimated to lowest order.
P. Anastasopoulos +3 more
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Is brane cosmology predictable? [PDF]
General Relativity and Gravitation, 2005 LaTeX file, 4 ...
Shin'ichi Nojiri, Sergei D. Odintsov
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