Reinterpreting several narrow `resonances' as threshold cusps
| dc.creator | Bugg, D. V. | |
| dc.date | 2004-06-25 | |
| dc.date.accessioned | 2026-07-07T10:29:11Z | |
| dc.date.available | 2026-07-07T10:29:11Z | |
| dc.description | The threshold pbar-p peak in BES data for J/Ψto gamma-pbar-p may be fitted as a cusp. It arises from the well known threshold peak in pbar-p elastic scattering due to annihilation. Several similar examples are discussed. The PS185 data for pbar-p to Lambdabar-Lambda require an almost identical cusp at the Lambdabar-Lambda threshold. There is also a cusp at the Sigma-N threshold in Kminus-d to piminus-Lambda-p. Similar cusps are likely to arise at thresholds for all 2-body de-excitation processes, providing the interaction is attractive; likely examples are Lambda-pbar, Sigma-pbar, and Kbar-Lambda. The narrow peak observed by Belle at 3872 MeV in piplus-piminus-J/Psi may be a 1++ cusp due to the Dbar-D* threshold. The narrow Xi*(1862) observed by NA49 may be due to a threshold cusp in Sigma(1385)-Kbar coupled to Xi-pi and Sigma-Kbar. The relation of cusps to known resonances such as fo(980) is discussed. | |
| dc.description | 15 pages, 5 figures. Submitted to Physics Letters B | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0406293 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0406293 | |
| dc.identifier | Phys.Lett.B598:8-14,2004 | |
| dc.identifier | doi:10.1016/j.physletb.2004.07.047 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177714 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Reinterpreting several narrow `resonances' as threshold cusps | |
| dc.type | text |