Topics, Nucleosynthesis Workshop, Trento 1997
The program will be worked out after feedback from participants.
A preliminary list of suggested topics:
- Astronomical observations on the abundances of the light elements.
For example the observations of primordial Deuterium abundance
as deduced from the lyman alpha forests of Quasar spectra.
- Comparison of astronomical observations and BBN predictions.
Possible discrepancy between the two.
Is this within expected statistical and systematic errors and if
not so, what are the likely new ingredients needed beyond the
standard models of particle physics and cosmology?
- Possible unaccounted systematic errors in the astronomical
- The applicablility of inferred presolar deuterium and helium 3
abundances as the taggers of the primordial abundances.
- Galactic chemical evolution.
- Stellar evolution of deuterium and helium 3. In particular
the production/destruction of helium 3 in stars.
- Deriving the 4He abundance from HII regions
- Impact of the low energy nuclear reaction rates and their
uncertainties on the nucleosynthesis prediction of the primordial
abundances; in particular for Lithium and heavier elements.
- Comparison of the various BBN codes; an effort to find
a true `standard nucleosynthesis code', cross-checked by several
- Modifications to the standard models of cosmology and particle
physics and nucleosynthesis constraints on these extensions.
- Inhomogeneous nucleosynthesis.
- Primordial baryon number inhomogeneity.
- Inhomogeneity produced in the phase transitions in the early
universe (QCD, EW, bubbles, surface tensions).
- The implications of the small baryon density inferred from BBN
on structure formation theories and dynamical observations
(from MACHOs to x-ray clusters and beyond).
Last updated: February 24, 1997.