Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Rhodes, C S"'
Brane models at low energy are described by an effective action involving gravity and two moduli fields associated with the brane positions. The scalar-tensor nature of the effective theory and the coupling to matter are explicitly spelt out. We disc
Externí odkaz:
http://arxiv.org/abs/hep-ph/0309180
The evolution of moduli fields, which naturally appear in higher dimensional models such as brane worlds, and their effects on the anisotropies of the cosmological microwave background radiation is discussed.
Comment: 5 pages, 4 figures; contrib
Comment: 5 pages, 4 figures; contrib
Externí odkaz:
http://arxiv.org/abs/hep-ph/0309181
Publikováno v:
Phys.Rev. D68 (2003) 083511
We discuss the effect of the time evolution of extra dimensions on CMB anisotropies and large-scale structure formation. We study the impact of scalar fields in a low-energy effective description of a general class of brane world models on the temper
Externí odkaz:
http://arxiv.org/abs/astro-ph/0306343
Publikováno v:
Astrophys.Space Sci. 283 (2003) 627-632
Higher-dimensional theories imply that some constants, such as the gravitational constant and the strength of the gauge-couplings, are not fundamental constants. Instead they are related to the sizes of the extra--dimensional space, which are moduli
Externí odkaz:
http://arxiv.org/abs/hep-ph/0210057
Publikováno v:
Phys.Rev.D67:023512,2003
We study cosmological consequences of non-constant brane world moduli in five dimensional brane world models with bulk scalars and two boundary branes. We focus on the case where the brane tension is an exponential function of the bulk scalar field,
Externí odkaz:
http://arxiv.org/abs/hep-th/0209158
Publikováno v:
Phys.Rev. D65 (2002) 121501
The modification to four--dimensional Einstein gravity at low energy in two brane models is investigated within supergravity in singular spaces. Using perturbation theory around a static BPS background, we study the effective four--dimensional gravit
Externí odkaz:
http://arxiv.org/abs/hep-th/0202136
Publikováno v:
Phys.Lett. B531 (2002) 135-142
The behaviour of the distance between two branes (the `radion') in a braneworld model with a bulk scalar field is investigated. We show that the BPS conditions of supergravity ensure that the dynamics of the scalar field and the radion are not indepe
Externí odkaz:
http://arxiv.org/abs/hep-th/0201191
Publikováno v:
Fractals, Vol. 9, No. 4, 471-480 (2001)
The interaction between the Earth's magnetic field and the solar wind plasma results in a natural plasma confinement system which stores energy. Dissipation of this energy through Joule heating in the ionosphere can be studied via the Auroral Electro
Externí odkaz:
http://arxiv.org/abs/astro-ph/0011144
Publikováno v:
Astrophysics & Space Science; 2003, Vol. 283 Issue 4, p627-632, 6p
