Hans-Werner Hammer (Darmstadt), Multi-particle correlations and short-distance particle production
We discuss multi-particle correlations in quantum systems close to the unitary limit of infinite scattering length. In halo nuclei, such correlations between neutrons can be measured by removing the core in hard knock-out reactions and measuring the neutron relative energy distributions in the final state. These distributions are largely determined by the multi-neutron final state interactions. At low energies, they can be strongly constrained by a non-relativistic conformal symmetry that becomes exact in the unitary limit. The multi-neutron system then behaves as a non-relativistic analog of Georgi's unparticle. Similar behavior can be observed in the short-distance production of hadrons with large scattering length. We explicitly discuss the case of neutral D mesons and comment on the case of B mesons.