The Roper and Radiative Decay of Pentaquarks
| dc.creator | Hong, Deog Ki | |
| dc.date | 2004-12-09 | |
| dc.date | 2005-01-03 | |
| dc.date.accessioned | 2026-07-07T03:54:04Z | |
| dc.date.available | 2026-07-07T03:54:04Z | |
| dc.description | Identifying the Roper N(1440) and N(1710) as the pentaquark octet and anti-decuplet, respectively, we analyze their main decay modes in the diquark picture. The ratio of the partial decay widths is largely consistent with the nearly ideal mixing of the Jaffe-Wilczek diquark model, which then allows to predict the width of the radiative decay of N(1440), $Γ_{10}(N\to pγ)=1/4 Γ_{12}(N\to nγ)=0.25-0.31$ MeV. We then show that the three-body radiative decay of the pentaquark anti-decuplet is quite enhanced due to its mixing with the pentaquark octet. We find for the $J^P={1/2}^+$ pentaquark anti-decuplet $Γ(Θ^+\to K^+ n γ)=0.034 \sim 0.041$ MeV. The diquark picture of the pentaquark predicts $Γ(Θ^+\to K^+ n γ) =4 Γ(Θ^+\to K^0 p γ)$. Finally we show that the difference in the Theta+ mass in the K0 p and K+ n decay channels may be accounted for by the missing photons in the radiative decay. | |
| dc.description | 10pages, 10 figures; Minor typos corrected: V3 added discussions on mass difference in theta+ in K0 p and K+ n: V4. Erros in numerical analysis corrected | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0412132 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0412132 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/44086 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Experiment | |
| dc.subject | Nuclear Experiment | |
| dc.subject | Nuclear Theory | |
| dc.title | The Roper and Radiative Decay of Pentaquarks | |
| dc.type | text |