CMB Constraint on Radion Evolution in the Brane World Scenario
| dc.creator | Chan, K. C. | |
| dc.creator | Chu, M. -C. | |
| dc.date | 2007-06-04 | |
| dc.date | 2007-08-29 | |
| dc.date.accessioned | 2026-07-07T11:16:36Z | |
| dc.date.available | 2026-07-07T11:16:36Z | |
| dc.description | In many versions of brane model, the modulus field of extra dimensions, the radion, could have cosmological evolution, which induces variation of the Higgs vacuum expectation value, $<H>$, resulting in cosmological variation of the electron mass $m_e$. The formation of Cosmic Microwave Background (CMB) anisotropies is thus affected, causing changes both in the peaks positions and amplitudes in the CMB power spectra. Using the three-year Wilkinson Microwave Anisotropies Probe (WMAP) CMB data, with the Hubble parameter $H_0$ fixed to be the Hubble Space Telescope (HST) result 72 km s$^{-1}$ Mpc$^{-1}$, we obtain a constraint on $ρ$, the ratio of the value of $<H>$ at CMB recombination to its present value, to be [0.97, 1.02]. | |
| dc.description | 7 pages, 6 figures, minor changes of format to conform with PRD format | |
| dc.identifier | https://arxiv.org/abs/0706.0391 | |
| dc.identifier | http://arxiv.org/abs/0706.0391 | |
| dc.identifier | Phys.Rev.D76:043525,2007 | |
| dc.identifier | doi:10.1103/PhysRevD.76.043525 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/192723 | |
| dc.subject | Astrophysics | |
| dc.title | CMB Constraint on Radion Evolution in the Brane World Scenario | |
| dc.type | text |