The pi-pi mass spectrum in Y(4260) -> pi-pi-J/psi
| dc.creator | Bugg, D. V. | |
| dc.date | 2007-01-03 | |
| dc.date | 2007-01-09 | |
| dc.date.accessioned | 2026-07-07T07:39:05Z | |
| dc.date.available | 2026-07-07T07:39:05Z | |
| dc.description | Three ways of fitting the pi-pi mass spectrum in Y(4260) decays are studied. Data presented recently by Belle cannot be fitted by the pi-pi S-wave intensity for elastic scattering. They can be fitted by adding a rather arbitrary destructive interference with the sigma pole term. A better fit may be obtained with the decay sequence Y -> pi-H, H -> pi-J/psi, where H is a JPC=1-- c-cbar-q-qbar state peaking at 4.0 GeV with a width ~280 MeV. A third possibility, involving a triangle diagram due to Y(4260)-> DD_1(2420), D_1->D*(2007)-pi, DD*->pi-J/psi fails to fit the data. The first and second possibilities could be resolved by analysis of the Y(4260) Dalitz plot and pi-J/psi mass projection, not presently publicly available. | |
| dc.description | 6 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0701002 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0701002 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/121317 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | The pi-pi mass spectrum in Y(4260) -> pi-pi-J/psi | |
| dc.type | text |