Bayesian Estimation of the D(p,?)<sup>3</sup>He Thermonuclear Reaction Rate
نویسندگان
چکیده
Abstract Big bang nucleosynthesis (BBN) is the standard model theory for production of light nuclides during early stages universe, taking place about 20 minutes after big bang. Deuterium production, in particular, highly sensitive to primordial baryon density and number neutrino species, its abundance serves as a test conditions universe. The comparison observed deuterium abundances with predicted ones requires reliable knowledge relevant thermonuclear reaction rates their corresponding uncertainties. Recent observations reported percent accuracy, but some theoretical predictions based on BBN are tension measured values because uncertainties cross section deuterium-burning reactions. In this work, we analyze S -factor D(p, ? ) 3 He using hierarchical Bayesian model. We take into account results 11 experiments, spanning period 1955–2021, more than any other study. also present two different fitting functions, two-parameter function microscopic nuclear four-parameter polynomial. Our recommended have 2.2% uncertainty at 0.8 GK, which temperature most important BBN. Differences between our previous discussed.
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2021
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/1538-4357/ac1db0