Radiative constraints on brane quintessence

Details Radiative constraints on brane quintessence Radiative constraints on brane quintessence

2003-10-08

arxiv.org/abs/astro-ph/0310208v2

JCAP 0402 (2004) 010

Astronomy and Astrophysics

Astrophysics

20 pages, 4 figures, uses iopart.cls, graphicx, bm.sty, slashed.sty; submitted to JCAP. Replaced with revised version accepted

Scientific paper

10.1088/1475-7516/2004/02/010

We investigate the constraints on quintessence arising from both renormalisable and non-renormalisable couplings where the 5d Planck mass is around the TeV scale. The quintessence field vacuum expectation value is typically of order the 4d Planck mass while non-renormalisable operators are expected to be suppressed by the 5d Planck mass. Non-renormalisable operators are therefore important in computing the 4d effective quintessence potential. We then study the quantum corrections to the quintessence potential due to fermion and graviton loops. The tower of Kaluza-Klein modes competes with the TeV-scale cut-off, altering the graviton contribution to the vacuum polarization of quintessence. Nevertheless we show that, as in four dimensions, the classical potential is stable to such radiative corrections.

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