Speaker
Description
Recent experiments [Duer et al., Nature 606 (2022)] suggest a resonance-like structure in the $^8\text{He(p,p}\alpha\text{)4n}$ reaction. To investigate this, we analyze four-neutron point-creation using pionless effective field theory (EFT) within the Faddeev-Yakubovsky formalism, which enables a decomposition into the 2+2 and 3+1 channel. This is particularly relevant given that dineutron-dineutron correlations (2+2 channel) may drive the observed structure [Lazauskas et al., PRL 130 (2023)].
Within this framework, we present results for the four-neutron point-creation rate, proportional to the cross section. These results are checked to be consistent, at both low and high energies, with conformal field theory (CFT), which treats the multi-neutron state as an 'unnucleus' [Hammer et Son, PNAS 118.35 (2021)]. This analysis aims to provide insight into the possible existence of a tetra-neutron resonance-like structure.
