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Big bang nucleosynthesis and the quark-hadron transition
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Schramm, David N. Kurki-Suonio, Hannu Olive, Keith A. Matzner, Richard A. |
| Copyright Year | 1989 |
| Description | An examination and brief review is made of the effects of quark-hadron transistion induced fluctuations on Big Bang nucleosynthesis. It is shown that cosmologically critical densities in baryons are difficult to reconcile with observation, but the traditional baryon density constraints from homogeneous calculations might be loosened by as much as 50 percent, to 0.3 of critical density, and the limit on the number of neutrino flavors remains about N(sub nu) is less than or approximately 4. To achieve baryon densities of greater than or approximately 0.3 of critical density would require initial density contrasts R is much greater the 10(exp 3), whereas the simplest models for the transition seem to restrict R to less than of approximately 10(exp 2). |
| File Size | 696336 |
| Page Count | 22 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900004852 |
| Archival Resource Key | ark:/13960/t8tb6135b |
| Language | English |
| Publisher Date | 1989-12-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Hadrons Boundary Value Problems Nuclear Fusion Phase Transformations Particle Interactions Astronomical Models Big Bang Cosmology Abundance Quarks Density Distribution Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
