Note on recent measurements of the $ψ(1S)\to\ga η_C(1S)$ and $ψ(2S)\to\ga η_C(1S)$ branching ratios
| dc.creator | Radford, Stanley F. | |
| dc.creator | Repko, Wayne W. | |
| dc.date | 2008-05-25 | |
| dc.date | 2008-05-30 | |
| dc.date.accessioned | 2026-07-07T12:27:22Z | |
| dc.date.available | 2026-07-07T12:27:22Z | |
| dc.description | Recently published measurements of the branching ratios ${\cal B}(ψ(1S)\to\ga η_C(1S))$ and ${\cal B}(ψ(2S)\to\ga η_C(1S))$ by the CLEO collaboration are examined in the context of a potential model that includes both relativistic and one-loop QCD corrections to the quark-antiquark interaction. The prediction for the width $Γ(ψ(1S)\to\ga η_C(1S))$ is in excellent agreement with the new data but the prediction for $Γ(ψ(2S)\to\ga η_C(1S))$ is too small. In an effort to understand this discrepancy, we derive an upper bound on $Γ(ψ(2S)\to\ga η_C(1S))$ and point out its experimental value saturates this bound. | |
| dc.description | Corrected typos, addeded reference | |
| dc.identifier | https://arxiv.org/abs/0805.3833 | |
| dc.identifier | http://arxiv.org/abs/0805.3833 | |
| dc.identifier | Phys.Rev.D78:057501,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.057501 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/215187 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Note on recent measurements of the $ψ(1S)\to\ga η_C(1S)$ and $ψ(2S)\to\ga η_C(1S)$ branching ratios | |
| dc.type | text |