Universality in the Four-Body System in an EFT Framework

Abstract

We extend previous calculations by Platter et al. to include higher partial waves using the same effective quantum mechanics approach for a non-relativistic four-boson system. The Yakubovsky equations are reduced to a simple eigenvalue problem, which is then solved numerically. Instead of introducing a three-body force, we fix the cutoff so that the three-body system is reproduced correctly. The thus obtained results show good agreement with Platter’s. Preliminary results for higher partial waves are shown as well.