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Cosmological Constraints on Large Extra Dimensions | | Malcolm Fairbairn
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12 Dec 2000 | | Journal: | Phys.Lett. B508 (2001) 335-339 | | Subject: | hep-ph astro-ph hep-th | | Affiliation: | University of Sussex | | Abstract: | We calculate the production of massive Kaluza-Klein(KK) modes via nucleon-nucleon gravi-bremsstrahlung in the early universe. Overproduction of these states would result in early matter domination and therefore a low age for the universe so it is possible to place constraints on the number and size of large extra dimensions. The constraints are stronger than those from Sn1987a - for 2 large extra dimensions and T_QCD=170 MeV, we show the fundamental scale must be larger than 1,000 TeV. | | Source: | arXiv, hep-ph/0101131 | | Services: | Forum | Review | PDF | Favorites | |
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