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- Title
Effective field theory calculation of two-deuteron radiative capture reaction at astrophysical energies.
- Authors
Sadeghi, H.; Khalili, H.
- Abstract
Two-deuteron radiative capture reaction is one of the deuterium-burning processes that the cross section is not well known at very low-energies. We develop the formalism based on pionless Effective Field Theory (EFT) for deuteron-deuteron ( dd) scattering to derive the cross section of two-deuteron radiative capture. Within this formalism the two- and three-body forces, should also be included in the capture cross section calculations. The aim of the present work is to calculate the observables of the low-energy dd photonuclear reactions. The cross section and the astrophysical S-factor for the H( d, γ)He reaction have been calculated. The He is studied as four-body bound states in the pionless EFT. The theoretical uncertainties for observables are estimated based on the variation of the cutoffs. The astrophysical S-factor is accurately determined to be 6.9×10 keV b (6.1×10 keV b) for two-body (two- and three-body) at zero energy. A satisfactory agreement between theory and experiment for dd radiative capture observables up to order of calculation has been found by insertion of three-body force.
- Subjects
FIELD theory (Physics); DEUTERONS; RADIATIVE capture; NUCLEAR cross sections; SCATTERING (Physics); MANY-body problem
- Publication
Astrophysics & Space Science, 2014, Vol 352, Issue 2, p637
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1007/s10509-014-1937-4