3 citations · 7 across the 3 of their papers we have counts for
9 papers
Two Particles with Zero-Range Interaction in a Magnetic Field
Johannes Kirscher, Brian C. Tiburzi
Energy levels are investigated for two charged particles possessing an attractive, momentum-independent, zero-range interaction in a uniform magnetic field. A transcendental equati…
Emergent four-body parameter in universal two-species bosonic systems
Lorenzo Contessi, Johannes Kirscher, Manuel Pavon Valderrama
The description of unitary few-boson systems is conceptually simple: only one parameter -- the three-body binding energy -- is required to predict the binding energies of clusters…
Triple-X and beyond: hadronic systems of three and more X(3872)
Lorenzo Contessi, Johannes Kirscher, Manuel Pavon Valderrama
The resonance has been conjectured to be a charm meson-antimeson two-body molecule. Meanwhile, there is no experimental evidence for larger, few-body co…
Multi-fermion systems with contact theories
Martin Schäfer, Lorenzo Contessi, Johannes Kirscher +1
We address the question of minimal requirements for the existence of quantum bound states. In particular, we demonstrate that a few-body system with zero-range momentum-independent…
Four-Body Scale in Universal Few-Boson Systems
Betzalel Bazak, Johannes Kirscher, Sebastian König +3
The role of an intrinsic four-body scale in universal few-boson systems is the subject of active debate. We study these systems within the framework of effective field theory. For…
Asymmetric regularization of the ground and excited state of the helium-4 nucleus
Johannes Kirscher, Harald W. Grießhammer
We find the threshold structure of the two- and three-nucleon systems, with the deuteron and 3H/3He as the only bound nuclei, sufficient to predict a pair of four-nucleon states: a…