Heavy-light bosonic and fermionic systems near unitarity

Over the years, numerous investigations have been conducted on few-body systems near the unitary limit. Notable attention has been dedicated to the exploration of bosonic systems, with a particular emphasis on understanding the Efimov effect in the context of three-interacting bosons near s-wave unitarity. This phenomenon carries significant implications for N-boson systems. Moreover, intriguing studies have been carried out on systems involving interacting fermions, such as those encountered in the BEC-BCS crossover problem and the realm of polaron physics. Building upon prior research into these systems, our current work employs the adiabatic hyperspherical treatment, concentrating on N-body systems of heavy (H) and light (L) particles with N>3. We are currently exploring universal physics near the unitarity regime for N=4, treating both HHLL and HHHL cases. We aim to quantify N-body recombination rates in these systems, drawing comparisons to the equal-mass case and provide valuable insights to support experimental endeavors. One further goal is to extend these studies to systems with N=5.