Heavy-baryon chiral perturbation theory approach to thermal neutron capture on ${}^{3}He$

Rimantas Lazauskas, Young-Ho Song, Tae-Sun Park

The cross section for radiative thermal neutron capture on ${}^{3}He$ ($\He3 +n \to \He4 +γ$; known as the $hen$ reaction) is calculated based on heavy-baryon chiral perturbation t…