Lyth, David H. and Moroi, Takeo (2004) The masses of weakly-coupled scalar fields in the early universe. Journal of High Energy Physics, 2004 (5). 004.Full text not available from this repository.
We consider the effective mass-squared in the early Universe, of a scalar field which has only Planck-suppressed couplings with light fields and whose true mass is less than the Hubble parameter H. A detailed investigation shows that the effective mass-squared generically is of order ±H2 during inflation and matter-domination, but much smaller during radiation domination. We consider the special circumstances under which the mass-squared may be much bigger or much smaller than the generic value.
|Journal or Publication Title:||Journal of High Energy Physics|
|Uncontrolled Keywords:||Cosmology of Theories beyond the SM ; Physics of the Early Universe|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited On:||24 Feb 2009 10:28|
|Last Modified:||27 Oct 2016 01:30|
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