Combined fit to BaBar and Belle data on e+e- to pi+pi- psi(2S)
| dc.creator | Liu, Z. Q. | |
| dc.creator | Qin, X. S. | |
| dc.creator | Yuan, C. Z. | |
| dc.date | 2008-05-23 | |
| dc.date.accessioned | 2026-07-07T11:51:03Z | |
| dc.date.available | 2026-07-07T11:51:03Z | |
| dc.description | A combined fit is performed to the BaBar and Belle measurements of the e+e- to pi+pi-psi(2S) cross sections for center-of-mass energy between threshold and 5.5 GeV. The resonant parameters of the Y(4360) and Y(4660) are determined. The mass is 4355^{+9}_{-10}\pm 9 MeV/c^2 and the width is 103^{+17}_{-15}\pm 11 MeV/c^2 for the Y(4360), and the mass is 4661^{+9}_{-8}\pm 6 MeV/c^2 and the width is 42^{+17}_{-12}\pm 6 MeV/c^2 for the Y(4660). The production of the Y(4260) in pi+pi-psi(2S) mode is found to be at 2σlevel, and B(Y(4260) to pi+pi-psi(2S))Γ_{e+e-} is found to be less than 4.3 eV/c^2 at the 90% confidence level, or equal to 7.4^{+2.1}_{-1.7} eV/c^2 depending on it interferes with the Y(4360) constructively or destructively. These information will shed light on the understanding of the nature of the Y states observed in initial state radiation processes. | |
| dc.description | 8 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0805.3560 | |
| dc.identifier | http://arxiv.org/abs/0805.3560 | |
| dc.identifier | Phys.Rev.D78:014032,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.014032 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/203765 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Combined fit to BaBar and Belle data on e+e- to pi+pi- psi(2S) | |
| dc.type | text |