MASSIVE SCALAR FIELDS IN THE EARLY UNIVERSE
نویسندگان
چکیده
منابع مشابه
Massive neutrinos and magnetic fields in the early universe
Primordial magnetic fields and massive neutrinos can leave an interesting signal in the CMB temperature and polarization. We perform a systematic analysis of general perturbations in the radiation-dominated universe, accounting for any primordial magnetic field and including leading-order effects of the neutrino mass. We show that massive neutrinos qualitatively change the large-scale perturbat...
متن کاملThe masses of weakly-coupled scalar fields in the early Universe
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 matterdomination, but much smaller during radiation domination. We consider the special...
متن کاملMagnetic Fields in the Early Universe
We discuss some old and new results on mangetic fields
متن کاملMagnetic Fields in the Early Universe
The observed galactic magnetic fields may have a primordial origin. I briefly review the observations, their interpretation in terms of the dynamo theory, and the current limits on cosmological magnetic fields. Several possible mechanisms for generating a primordial magnetic field are then discussed. Turbulence and the evolution of the microscopic fields to macroscopic fields is described in te...
متن کاملBlack Hole Formation from Massive Scalar Fields
It is shown that there exists a range of parameters in which gravitational collapse with a spherically symmetric massive scalar field can be treated as if it were collapsing dust. This implies a criterion for the formation of black holes depending on the size and mass of the initial field configuration and the mass of the scalar field. Pacs numbers: 03.70.+k, 98.80.Cq Typeset using REVTEX
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Modern Physics D
سال: 2004
ISSN: 0218-2718,1793-6594
DOI: 10.1142/s0218271804005274