Results 91 to 100 of about 177,126,089 (182)

Was Newtonian Cosmology Really Inconsistent? [PDF]

, 2008
This paper follows up a debate as to the consistency of Newtonian cosmology. Whereas Malament (1995) has shown that Newtonian cosmology *is* not inconsistent, to date there has been no analysis of Norton’s claim (1995) that Newtonian cosmology *was ...
Vickers, Peter John
core  

Self-interacting dark matter with a vector mediator: kinetic mixing with the U 1 B − L 3 $$ \mathrm{U}{(1)}_{{\left(B-L\right)}_3} $$ gauge boson

Journal of High Energy Physics, 2019
A spontaneously broken hidden U(1) h gauge symmetry can explain both the dark matter stability and the observed relic abundance. In this framework, the light gauge boson can mediate the strong dark matter self-interaction, which addresses astrophysical ...
Ayuki Kamada, Masaki Yamada, Tsutomu T. Yanagida   +2 more
doaj   +1 more source

BBN constraints on universally-coupled ultralight scalar dark matter

Journal of High Energy Physics, 2020
Ultralight scalar dark matter can interact with all massive Standard Model particles through a universal coupling. Such a coupling modifies the Standard Model particle masses and affects the dynamics of Big Bang Nucleosynthesis. We model the cosmological
Sergey Sibiryakov, Philip Sørensen, Tien-Tien Yu   +2 more
doaj   +1 more source

Dark radiation and superheavy dark matter from black hole domination

Journal of High Energy Physics, 2019
If even a relatively small number of black holes were created in the early universe, they will constitute an increasingly large fraction of the total energy density as space expands.
Dan Hooper, Gordan Krnjaic, Samuel D. McDermott   +2 more
doaj   +1 more source

COSMOLOGY AND SOCIETY: HOUSEHOLD RITUAL AMONG THE TERMINAL CLASSIC MAYA PEOPLE OF YAXHA (ca. A.D. 850-950), GUATEMALA [PDF]

, 2013
This study of domestic ritual and symbolism centers on the ancient Maya kingdom of Yaxha in northeastern Guatemala, during the last part of the Classic period (A.D. 850-950/1000).
Gamez Diaz, Laura
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Augury of darkness: the low-mass dark Z ′ portal

Journal of High Energy Physics, 2017
Dirac fermion dark matter models with heavy Z ′ mediators are subject to stringent constraints from spin-independent direct searches and from LHC bounds, cornering them to live near the Z ′ resonance.
Alexandre Alves, Giorgio Arcadi, Yann Mambrini, Stefano Profumo, Farinaldo S. Queiroz   +4 more
doaj   +1 more source

Traces of Extra Dimensions in Cosmology [PDF]

, 2010
In this thesis, we discuss the observational consequences of extra dimensions on cosmological phenomena. We begin with an overview of extra dimensions, from the initial ideas of Kaluza and Klein to the more recent concept of braneworld models and in ...
O'Callaghan, Eimear Eileen, O'CALLAGHAN, EIMEAR,EILEEN   +1 more
core  

The dynamics of cosmological scenarios inspired by quantum gravity [PDF]

, 2006
PhDIn this thesis we study the dynamics of cosmological scenarios inspired by quantum gravity. Part I investigates novel features of the semi-classical regime of homogeneous and isotropic loop quantum cosmology.
Mulryne, David James
core   +1 more source

Detection of early-universe gravitational-wave signatures and fundamental physics. [PDF]

Gen Relativ Gravit, 2022
Caldwell R, Cui Y, Guo HK, Mandic V, Mariotti A, No JM, Ramsey-Musolf MJ, Sakellariadou M, Sinha K, Wang LT, White G, Zhao Y, An H, Bian L, Caprini C, Clesse S, Cline JM, Cusin G, Fornal B, Jinno R, Laurent B, Levi N, Lyu KF, Martinez M, Miller AL, Redigolo D, Scarlata C, Sevrin A, Haghi BSE, Shu J, Siemens X, Steer DA, Sundrum R, Tamarit C, Weir DJ, Xie KP, Yang FW, Zhou S.   +37 more
europepmc   +1 more source

On the physical basis of cosmic time [PDF]

, 2008
In this manuscript we initiate a systematic examination of the physical basis for the time concept in cosmology. We discuss and defend the idea that the physical basis of the time concept is necessarily related to physical processes which could ...
Zinkernagel, Henrik, Rugh, Svend E.
core