| タイトル | Neutrino degeneracy and cosmological nucleosynthesis, revisited |
| 本文（外部サイト） | http://hdl.handle.net/2060/19910019796 |
| 著者（英） | Walker, T. P.; Olive, K. A.; Schramm, David N.; Thomas, D. |
| 著者所属（英） | Minnesota Univ. |
| 発行日 | 1991-07-01 |
| 言語 | eng |
| 内容記述 | A reexamination of the effects of non-zero degeneracies on Big Bang Nucleosynthesis is made. As previously noted, non-trivial alterations of the standard model conclusions can be induced only if excess lepton numbers L sub i, comparable to photon number densities eta sub tau, are assumed (where eta sub tau is approx. 3 times 10(exp 9) eta sub b). Furthermore, the required lepton number densities (L sub i eta sub tau) must be different for upsilon sub e than for upsilon sub mu and epsilon sub tau. It is shown that this loophole in the standard model of nucleosynthesis is robust and will not vanish as abundance and reaction rate determinations improve. However, it is also argued that theoretically (L sub e) approx. (L sub mu) approx. (L sub tau) approx. eta sub b is much less than eta sub tau which would preclude this loophole in standard unified models. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 91N29110
NAS 1.26:188703
FERMILAB-PUB-91/192-A
NASA-CR-188703 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/131354 |
|
