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Constraints on the birth of the universe and origin of cosmic dark flow
- Source :
- International Journal of Modern Physics A, Vol. 30 (2015) 1545022
- Publication Year :
- 2015
-
Abstract
- We summarize three recent efforts to constrain the first few moments of cosmic creation before and during the epoch of inflation. We consider two means to explain a slight dip in the power spectrum of the cosmic microwave background for multipoles in the range of $\ell= 10-30$ from both the {\it Planck} and {\it WMAP} data. We show that such a dip could be the result of resonant creation of a massive particle that couples to the inflaton field. For best-fit models, the epoch of resonant particle creation reenters the horizon at wave numbers of $k_* \sim 0.00011 \pm 0.0004 $ ($h$ Mpc$^{-1}$). The amplitude and location of these features correspond to the creation of a number of degenerate fermion species of mass $\sim 15/\lambda^{3/2} $ $m_{pl}$ during inflation where $\lambda$ is the coupling constant between the inflaton field and the created fermion species. Alternatively, one can explain the existence of such a dip as due to a jump in the inflation generating potential. We show that such a jump can also resolve the excessively large dark flow predicted from the M-theory landscape. Finally, we summarize our efforts to quantify constraints on the cosmic dark flow from a new analysis of the Type Ia supernova distance-redshift relation.<br />Comment: 16 PAGES, 4 FIGURES,The International Conference on Gravitation and Cosmology/The Fourth Galileo-Xu Guangqi Meeting, Beijing, China, May 4-8, 2015
- Subjects :
- Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Database :
- arXiv
- Journal :
- International Journal of Modern Physics A, Vol. 30 (2015) 1545022
- Publication Type :
- Report
- Accession number :
- edsarx.1508.01214
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1142/S0217751X15450220