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7 papers · 2 filters
Constraints from Inflation and Reheating on Superpartner Masses
Toby Falk, Keith A. Olive, Leszek Roszkowski +2
Flat directions in the Minimal Supersymmetric Standard Model (MSSM) can become unstable due to radiative corrections, and the global minimum of the (zero temperature) potential can…
Nucleosynthesis bounds on small Dirac neutrino masses due to chiral symmetry breaking
John McDonald
We consider nucleosynthesis constraints on models which use chiral symmetry breaking as a basis for understanding very small Dirac neutrino masses. We show that present big-bang nu…
u^{c}d^{c}d^{c}-Based Affleck-Dine Baryogenesis
J. McDonald
We consider the possibility of a successful Affleck-Dine mechanism along the u^c d^c d^c direction in R-parity symmetric extensions of the minimal supersymmetric Standard Model (MS…
Cosmological consequences of particle creation during inflation
David H. Lyth, David Roberts
Particle creation during inflation is considered. It could be important for species whose interaction is of gravitational strength or weaker. A complete but economical formalism is…
More varieties of hybrid inflation
David H. Lyth, Ewan D. Stewart
It is pointed out that hybrid inflation can be implemented with the inflaton field rolling away from the origin instead of towards it. This `inverted' hybrid inflation has a spectr…
What would we learn by detecting a gravitational wave signal in the cosmic microwave background anisotropy?
David H. Lyth
Inflation generates gravitational waves, which may be observable in the low multipoles of the cosmic microwave background (cmb) anisotropy but only if the inflaton field variation…