Two-photon width of eta_b, eta'_b and eta''_b from Heavy-Quark Spin Symmetry
| dc.creator | Lansberg, J. P. | |
| dc.creator | Pham, T. N. | |
| dc.date | 2006-09-26 | |
| dc.date | 2006-10-03 | |
| dc.date.accessioned | 2026-07-07T11:05:47Z | |
| dc.date.available | 2026-07-07T11:05:47Z | |
| dc.description | We predict the two-photon width of the pseudoscalar bottomonia, Gamma(eta_b -> gamma gamma), Gamma(eta'_b -> gamma gamma) and Gamma(eta''_b -> gamma gamma) within a Heavy-Quark Spin-Symmetry setting following the same line as our recent work for the corresponding decays for charmonia. Binding-energy effects are included for excited states and are shown to shift up the eta'_b and eta''_b widths by 10 %. We point out that the essentially model independent ratio Gamma(eta_b -> gamma gamma)/Gamma(Upsilon -> ll) and the branching ratio BR(eta_b -> gamma gamma) obtained could be used to extract the coupling constant alpha_s. | |
| dc.description | 3 pages, Revtex4; v2: 2 references added | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0609268 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0609268 | |
| dc.identifier | Phys.Rev.D75:017501,2007 | |
| dc.identifier | doi:10.1103/PhysRevD.75.017501 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/189314 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Two-photon width of eta_b, eta'_b and eta''_b from Heavy-Quark Spin Symmetry | |
| dc.type | text |