Low-Energy Photodisintegration of the Deuteron and Big-Bang Nucleosynthesis

W. Tornow; N. G. Czakon; C. R. Howell; A. Hutcheson; J. H. Kelley; V. N. Litvinenko; S. Mikhailov; I. V. Pinayev; G. J. Weisel; H. Witala

doi:10.1016/j.physletb.2003.08.078

arXiv · nucl-ex/0309009

Low-Energy Photodisintegration of the Deuteron and Big-Bang Nucleosynthesis

W. Tornow·N. G. Czakon·C. R. Howell·A. Hutcheson·J. H. Kelley·V. N. Litvinenko·S. Mikhailov·I. V. Pinayev·G. J. Weisel·H. Witala

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Abstract

The photon analyzing power for the photodisintegration of the deuteron was measured for seven gamma-ray energies between 2.39 and 4.05 MeV using the linearly polarized gamma-ray beam of the High-Intensity Gamma-ray Source at the Duke Free-Electron Laser Laboratory. The data provide a stringent test of theoretical calculations for the inverse reaction, the neutron-proton radiative capture reaction at energies important for Big-Bang Nucleosynthesis. Our data are in excellent agreement with potential model and effective field theory calculations. Therefore, the uncertainty in the baryon density obtained from Big-Bang Nucleosynthesis can be reduced at least by 20%.

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W. Tornow, N. G. Czakon, C. R. Howell, A. Hutcheson, J. H. Kelley, V. N. Litvinenko, S. Mikhailov, I. V. Pinayev, G. J. Weisel, H. Witala. 2003-09-10. Low-Energy Photodisintegration of the Deuteron and Big-Bang Nucleosynthesis. https://doi.org/10.1016/j.physletb.2003.08.078

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