### On graviton production in braneworld cosmologyOn graviton production in braneworld cosmology

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 Author Cartier, Cyril ♦ Durrer, Ruth ♦ Ruser, Marcus Source arXiv.org Content type Text File Format PDF Date of Submission 2005-10-18 Language English
 Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Astronomy & allied sciences ♦ Physics Subject Keyword High Energy Physics - Theory ♦ Astrophysics ♦ General Relativity and Quantum Cosmology ♦ physics:astro-ph ♦ physics:gr-qc ♦ physics:hep-th Abstract We study braneworlds in a five dimensional bulk, where cosmological expansion is mimicked by motion through AdS$_5$. We show that the five dimensional graviton reduces to the four dimensional one in the late time approximation of such braneworlds. Inserting a fixed regulator brane far from the physical brane, we investigate quantum graviton production due to the motion of the brane. We show that the massive Kaluza-Klein modes decouple completely from the massless mode and they are not generated at all in the limit where the regulator brane position goes to infinity. In the low energy limit, the massless four dimensional graviton obeys the usual 4d equation and is therefore also not generated in a radiation-dominated universe. Description Reference: Phys.Rev.D72:104018,2005 Educational Use Research Learning Resource Type Article Page Count 9