85 citations · 228 across the 8 of their papers we have counts for
9 papers
Isovector and hidden-beauty partners of the X(3872)
Hallstein Hogaasen, Emi Kou, Jean-Marc Richard +1
The isovector partners of the X(3872), recently found at BES III, Belle and CLEO-c were predicted in a simple model based on the chromomagnetic interaction among quarks (H. Hogaase…
Two-electron atoms, ions and molecules
Hallstein Hogaasen, Jean-Marc Richard, Paul Sorba
The quantum mechanics of two-electron systems is reviewed, starting with the ground state of the helium atom and helium-like ions, with central charge . For Z=1, demonstrat…
On Quarks and Flavour Symmetry
H. Hogaasen, Paul Sorba
Hadronic spectroscopy can be introduced to students and developed rather far without requiring SU(N) flavour symmetry. In such a "minimalist" presentation, we are naturally led to…
Chromomagnetism, flavour symmetry breaking and S-wave tetraquarks
Franco Buccella, Hallstein Hogaasen, Jean-Marc Richard +1
The chromomagnetic interaction, with full account for flavour-symmetry breaking, is applied to S-wave configurations containing two quarks and two antiquarks. Phenomenological impl…
A chromomagnetic mechanism for the X(3872) resonance
H. Hogaasen, J. M. Richard, P. Sorba
The chromomagnetic interaction, with proper account for flavour-symmetry breaking, is shown to explain the mass and coupling properties of the X(3872) resonance as a = 1$^…
Quark-quark correlations and baryon electroweak observables
H. Hogaasen, K. Kubodera, F. Myhrer
The simple independent quark models have difficulties explaining simultaneously the totality of the known hyperon magnetic moments and hyperon semi-leptonic decay rates. We show th…