Masses of the η_c(nS) and η_b(nS) mesons
| dc.creator | Badalian, A. M. | |
| dc.creator | Bakker, B. L. G. | |
| dc.date | 2006-09-05 | |
| dc.date.accessioned | 2026-07-07T11:05:40Z | |
| dc.date.available | 2026-07-07T11:05:40Z | |
| dc.description | The hyperfine splittings in heavy quarkonia are studied using new experimental data on the di-electron widths. The smearing of the spin-spin interaction is taken into account, while the radius of smearing is fixed by the known $J/ψ-η_c(1S)$ and $ψ(2S)-η'_c(2S)$ splittings and appears to be small, $r_{ss} \approx 0.06$ fm. Nevertheless, even with such a small radius an essential suppression of the hyperfine splittings ($\sim 50%)$ is observed in bottomonium. For the $nS b\bar b$ states $(n=1,2,...6)$ the values we predict (in MeV) are 28, 12, 10, 6, 6, and 3, respectively. In single-channel approximation for the $3S$ and $4S$ charmonium states the splittings 16(2) MeV and 12(4) MeV are obtained. | |
| dc.description | 13 pages, no figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0609044 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0609044 | |
| dc.identifier | Phys.Lett.B646:29-33,2007 | |
| dc.identifier | doi:10.1016/j.physletb.2006.12.066 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/189275 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Masses of the η_c(nS) and η_b(nS) mesons | |
| dc.type | text |