Cosmological hydrogen recombination: The effect of extremely high-n states (2009)
Grin, Daniel, Hirata, Christopher M.
Calculations of cosmological hydrogen recombination are vital for the extraction of cosmological parameters from cosmic microwave background (CMB) observations, and for imposing constraints to...
Thermal axion constraints in non-standard thermal histories (2008)
Grin, Daniel, Smith, Tristan, Kamionkowski, Marc
There is no direct evidence for radiation domination prior to big-bang nucleosynthesis, and so it is useful to consider how constraints to thermally-produced axions change in non-standard thermal...
Axion constraints in nonstandard thermal histories (2008)
Grin, Daniel, Smith, Tristan L., Kamionkowski, Marc
It is usually assumed that dark matter is produced during the radiation-dominated era. There is, however, no direct evidence for radiation domination prior to big-bang nucleosynthesis. Two...
Lower Limit to the Scale of an Effective Quantum Theory of Gravitation (2008)
An effective quantum theory of gravitation in which gravity weakens at energies higher than ~10^-3 eV is one way to accommodate the apparent smallness of the cosmological constant. Such a theory...
Axion constraints in non-standard thermal histories (2007)
Grin, Daniel, Smith, Tristan L., Kamionkowski, Marc
It is usually assumed that dark matter is produced during the radiation dominated era. There is, however, no direct evidence for radiation domination prior to big-bang nucleosynthesis. Two...
Telescope search for decaying relic axions (2007)
Grin, Daniel, Covone, Giovanni, Kneib, Jean-Paul, Kamionkowski, Marc, Blain, Andrew, Jullo, Eric
A search for optical line emission from the two-photon decay of relic axions was conducted in the galaxy clusters Abell 2667 and 2390, using spectra from the VIMOS (Visible MultiObject Spectrograph)...
A Telescope Search for Decaying Relic Axions (2006)
Grin, Daniel, Covone, Giovanni, Kneib, Jean-Paul, Kamionkowski, Marc, Blain, Andrew, Jullo, Eric
A search for optical line emission from the two-photon decay of relic axions was conducted in the galaxy clusters Abell 2667 and 2390, using spectra from the VIMOS (Visible Multi-Object Spectrograph)...
Lower Limit to the Scale of an Effective Theory of Gravitation (2006)
We consider a linearized, effective quantum theory of gravitation in which gravity weakens at energies higher than ~10^-3 eV in order to accommodate the apparent smallness of the cosmological...