scholarly journals New observational limits on dark radiation in braneworld cosmology

2017 ◽  
Vol 95 (8) ◽  
Author(s):  
Nishanth Sasankan ◽  
Mayukh Raj Gangopadhyay ◽  
Grant J. Mathews ◽  
Motohiko Kusakabe
Keyword(s):  
Dark Radiation ◽  
Braneworld Cosmology

Dark radiation may end cosmic puzzle

2018 ◽  
Vol 237 (3171) ◽  
pp. 12
Author(s):  
Anil Ananthaswamy
Keyword(s):  
Dark Radiation

scholarly journals The axiverse induced dark radiation problem

2016 ◽  
Vol 2016 (4) ◽  
pp. 1-17 ◽  
Author(s):  
Bobby Acharya ◽  
Chakrit Pongkitivanichkul
Keyword(s):  
Radiation Problem ◽  
Dark Radiation

scholarly journals Gravitational baryogenesis in Gauss-Bonnet braneworld cosmology

2005 ◽  
Vol 71 (12) ◽  
Author(s):  
M. C. Bento ◽  
R. González Felipe ◽  
N. M. C. Santos
Keyword(s):  
Braneworld Cosmology

scholarly journals Nonlinear matter terms in general scalar–tensor braneworld cosmology

2019 ◽  
Vol 28 (11) ◽  
pp. 1950138
Author(s):  
Kevin F. S. Pardede ◽  
Agus Suroso ◽  
Freddy P. Zen
Keyword(s):  
Big Bang ◽  
Accelerated Expansion ◽  
Big Bang Nucleosynthesis ◽  
Braneworld Cosmology ◽  
Strongly Coupled ◽  
Weakly Coupled ◽  
General Scalar ◽  
Bulk Scalar Field ◽  
The Big Bang ◽  
Correction Terms

A five-dimensional braneworld cosmological model in general scalar–tensor action that is comprised of various Horndeski Lagrangians is considered. The Friedmann equations in the case of strongly and weakly coupled [Formula: see text] Horndeski Lagrangians have been obtained. The strongly coupled [Formula: see text] model produces the Cardassian term [Formula: see text] with [Formula: see text], which can serve as an alternative explanation for the accelerated expansion phase of the universe. Furthermore, the latest combined observational facts from BAO, CMB, SNIa, [Formula: see text] and [Formula: see text] value observation suggest that the [Formula: see text] term lies quite close to the constrained value. On the other hand, the weakly coupled [Formula: see text] case has several new correction terms which are omitted in the braneworld Einstein–Hilbert model, e.g. the cubic [Formula: see text] and the dark radiation–matter interaction term [Formula: see text]. Furthermore, this model provides a cosmological constant constructed from the bulk scalar field, requires no brane tension and supports the big bang nucleosynthesis (BBN) constraint naturally.

scholarly journals Dark Atoms and Dark Radiation

2014 ◽  
Vol 2014 ◽  
pp. 1-2
Author(s):  
Maxim Khlopov ◽  
Konstantin Belotsky ◽  
Jean-René Cudell ◽  
Chris Kouvaris
Keyword(s):  
Dark Radiation
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