A fitted Killingbeck potential reproduces B, B_s, and B_c masses to under 0.5% for selected parameters, but its wavefunction at the origin is unreliable, inflating the B decay constant by up to 84%.
Barnea, arXiv preprint 10.48550/arXiv.2603.09350 (2026), 6 pages, 4 figures, arXiv:2603.09350 [physics.atom-ph]
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Spectroscopic and Structural Properties of $B$, $B_s$, and $B_c$ Mesons within a Non-Relativistic Potential Model: A Comparative Analysis via Matrix Numerov and Variational Methods
A fitted Killingbeck potential reproduces B, B_s, and B_c masses to under 0.5% for selected parameters, but its wavefunction at the origin is unreliable, inflating the B decay constant by up to 84%.