Big Bang nucleosynthesis and the quark-hadron transition

Technical Report · Thu Nov 30 23:00:00 EST 1989

OSTI ID:7143515

Kurki-suonio, H; Matzner, R A; Olive, K A; Schramm, D N

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 much greater than 10(exp 3), whereas the simplest models for the transition seem to restrict R to less than approximately 10(exp 2).

• Research Organization: Drexel Univ., Philadelphia, PA (USA)
• OSTI ID: 7143515
• Report Number(s): N-90-14168; NASA-CR--186169; NAS--1.26:186169; FERMILAB-PUB--89/252-A
• Country of Publication: United States
• Language: English

Related Subjects

640106* -- Astrophysics & Cosmology-- Cosmology
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
BARYONS
BOUNDARY-VALUE PROBLEMS
COSMOLOGICAL MODELS
COSMOLOGY
DATA
DENSITY
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INFORMATION
INTERACTIONS
MATHEMATICAL MODELS
NUCLEOSYNTHESIS
NUMERICAL DATA
PARTICLE INTERACTIONS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
POSTULATED PARTICLES
QUARKS
SYNTHESIS
THEORETICAL DATA