Skip to Main Content

Access Provided by Xinjiang University

Physical Review D

Access by Xinjiang University

Massless and massive graviton spectra in anisotropic dilatonic braneworld cosmologies

Dipartimento di Fisica, Università di Bari, and Istituto Nazionale di Fisica Nucleare, Sezione di Bari Via G. Amendola 173, 70126 Bari, Italy

Phys. Rev. D 73, 124015 – Published 12 June, 2006

DOI: https://doi.org/10.1103/PhysRevD.73.124015

Abstract

We consider a braneworld model in which an anisotropic brane is embedded in a dilatonic background. We find the background solutions and study the behavior of the perturbations when the universe evolves from an inflationary Kasner phase to a Minkowski phase. We calculate the massless mode spectrum, and find that it does not differ from what expected in standard four-dimensional cosmological models. We then evaluate the spectrum of both light (ultrarelativistic) and heavy (nonrelativistic) massive modes, and find that, at high energies, there can be a strong enhancement of the Kaluza-Klein spectral amplitude, which can become dominant in the total spectrum. The presence of the dilaton, on the contrary, decrease the relative importance of the massive modes.

Article Text

References (27)

L. Randall and R. Sundrum, Phys. Rev. Lett. 83, 4690 (1999).
R. Maartens, Living Rev. Relativity 7, 7 (2004).
N. Deruelle, T. Dolezel, J. Katzand , Phys. Rev. D 63, 083513 (2001).
K. Koyama and J. Soda, Phys. Rev. D 62, 123502 (2000).
D. Langlois, R. Maartens, and D. Wands, Phys. Lett. B 489, 259 (2000).
D. S. Gorbunov, V. A. Rubakov, and S. M. Sibiryakov, J. High Energy Phys. 10 (2001) 015.
T. Kobayashi, H. Kudoh, and T. Tanaka, Phys. Rev. D 68, 044025 (2003).
R. Easther, D. Langlois, R. Maartens, and D. Wands, J. Cosmol. Astropart. Phys. 10 (2003) 014.
M. Cavaglia, G. De Risi, and M. Gasperini, Phys. Lett. B 610, 9 (2005).
C. Cartier, R. Durrer, and M. Ruser, Phys. Rev. D 72, 104018 (2005).
T. Kobayashi and T. Tanaka, Phys. Rev. D 73, 044005 (2006).
R. Maartens, D. Wands, B. A. Bassett, and I. Heard, Phys. Rev. D 62, 041301 (2000).
K. i. Maeda and D. Wands, Phys. Rev. D 62, 124009 (2000).
V. Bozza, M. Gasperini, and G. Veneziano, Nucl. Phys. B619, 191 (2001).
K. Koyama K. Takahashiand , Phys. Rev. D 67, 103503 (2003).
K. Koyama and K. Takahashi, Phys. Rev. D 68, 103512 (2003).
T. Kobayashi and T. Tanaka, Phys. Rev. D 69, 064037 (2004).
W. Israel, Nuovo Cimento B 44S10, 1 (1966);
T. Shiromizu, K. i. Maeda, and M. Sasaki, Phys. Rev. D 62, 024012 (2000).
A. N. Aliev and A. E. Gumrukcuoglu, Classical Quantum Gravity 21, 5081 (2004).
M. Gasperini and G. Veneziano, Astropart. Phys. 1, 317 (1993).
M. Gasperini and G. Veneziano, Phys. Rep. 373, 1 (2003).
M. Cvetic, H. Lu, and C. N. Pope, Phys. Rev. D 63, 086004 (2001).
M. Maggiore, Phys. Rep. 331, 283 (2000).
J. Audretsch, J. Phys. A 12, 1189 (1979).
A. E. Lawrence and E. J. Martinec, Classical Quantum Gravity 13, 63 (1996).
N. D. Birrell and P. C. W. Davies, Quantum Fields In Curved Space (Cambridge University Press, Cambridge 1982).