Neutron-Neutron Fusion

Details Neutron-Neutron Fusion Neutron-Neutron Fusion

2005-07-22

arxiv.org/abs/nucl-th/0507048v2

Phys.Lett. B633 (2006) 253-259

Physics

Nuclear Physics

Nuclear Theory

14 pages, 4 figures, minor correction, accepted for publication in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2005.11.085

The neutron-neutron fusion process, $nn\to de\nu$, at very low neutron energies is studied in the framework of pionless effective field theory that incorporates dibaryon fields. The cross section and electron energy spectrum for this process are calculated up to next-to-leading order. We include the radiative corrections of ${\cal O}(\alpha)$ calculated for the one-body transition amplitude. The precision of our theoretical estimates is found to be governed essentially by the accuracy with which the empirical values of the neutron-neutron scattering length and effective range are currently known. Also discussed is the precision of theoretical estimates of the transition rates of related electroweak processes in few-nucleon systems.

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