Quark matter and cosmology
- Chicago Univ., IL (United States)
The possible implications of the quark-hadron transition for cosmology are explored. Possible surviving signatures are discussed. In particular, the possibility of generating a dark matter candidate such as strange nuggets or planetary mass black holes is noted. Much discussion is devoted to the possible role of the transition for cosmological nucleosynthesis. It is emphasized that even an optimized first order phase transition will not significantly alter the nucleosynthesis constraints on the cosmological baryon density nor on neutrino counting. However, it is noted that Be and B observations in old stars may eventually be able to be a signature of a cosmologically significant quark-hadron transition. It is pointed out that the critical point in this regard is whether the observed B/Be ratio can be produced by spallation processes or requires cosmological input. Spallation cannot produce a B/Be ratio below 7.6. A supporting signature would be Be and B ratios to oxygen that greatly exceed galactic values. At present, all data is still consistent with a spallagenic origin.
- Research Organization:
- Fermi National Accelerator Lab., Batavia, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Aeronautics and Space Administration, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH03000; FG02-91ER40606
- OSTI ID:
- 10138522
- Report Number(s):
- FNAL/C-92/20-A; CONF-9111165-12; ON: DE92011736; CNN: Grant AST 90-22629; Grant NAGW-1381; Grant NAGW-1321
- Resource Relation:
- Conference: Quark matter `91,Gatlinburg, TN (United States),11-15 Nov 1991; Other Information: PBD: Jan 1992
- Country of Publication:
- United States
- Language:
- English
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