118011302
Big bang nucleosynthesis : the morning after
119379976
A Model for neutrino masses and dark matter
Department of PhysicsSyracuse UniversitySyracuse, NY 13244-1130, USA(Dated: February 1, 2008)We propose a model for neutrino masses that simultaneously results in a new dark matter can-didate, the right-handed neutrino. We derive the dark matter abundance in this model, show howthe hierarchy of neutrino masses is obtained, and verify that the model is compatible with existingexperimental results. The model provides an economical method of unifying two seemingly separatepuzzles in contemporary particle physics and cosmology.
119915283
Baryosynthesis and promordial inflation reexamined
Abstract We demonstrate that previous estimates of baryosynthesis levels in supergravity models designed to produce completely acceptable cosmological scenarios have been incorrect. With baryosynthesis with light Higgs, produced after primordial inflation with a mass ∼ 10 10 GeV, we find n B / n γ ≲ 10 −5 e, where e is the baryon number asymmetry per decay.
115849313
Issues in Neutrino Particle Astrophysics
117356126
Neutrino masses and cosmology: a brief review.
26368547
Higher-order pair-conversion peaks in heavy-ion collisions.
We analyze quantum electrodynamic pair creation from vibrating nuclear ''quasimolecules'' which may occur in collisions of heavy ions. We find that higher-order processes, which can be phenomenologically relevant for sufficiently long lived systems, can result in coincident narrow peaks even for subcritical systems. The Z dependence of the energy of the peaks can be much softer than that predicted for positrons from ''sparking'' of the vacuum. Our results may be relevant to peaks which have been observed at the Gesellschaft fuer Schwerionenforschung (GSI).
119117884
Proceedings of the 2nd Workshop on Flavor Symmetries and Consequences in Accelerators and Cosmology (FLASY12)
Although existing theoretical models generally prefer extremely heavy right-handed neutrinos to generate light neutrino masses via the seesaw mechanism, there are several observed phenomena that point to the existence of both keVand eV-scale sterile neutrinos. We present two A4 flavor symmetry models that can accommodate light sterile neutrinos and remain compatible with neutrino data. Higher order seesaw terms and higher-dimensional operators are studied, and the phenomenological implications of light sterile neutrinos on neutrinoless double beta decay are discussed. 1.