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Big bang nucleosynthesis: Present status

Richard H. CyburtNational Superconducting Cyclotron LaboratoryBrian D. FieldsDepartments of Astronomy and of Physics, University of Illinois, Urbana, Illinois 61801, USAKeith A. OliveJoint Institute for Nuclear Astrophysics (JINA), National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USATsung‐Han YehMichigan State University
2016en
ABI

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How do we understand the production of the lightest nuclides from H to Li during the first seconds of cosmic time? This article reviews recent developments based on new precision cosmic microwave background measurements from the Planck satellite and observational abundance data. Utilizing updated input on nuclear reactions and the neutron lifetime as well as limits on the baryon density of the Universe obtained from Planck data leads to a number of neutrino flavors.

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