Two-pion transitions in quarkonium revisited
| dc.creator | Voloshin, M. B. | |
| dc.date | 2006-06-24 | |
| dc.date.accessioned | 2026-07-07T10:41:48Z | |
| dc.date.available | 2026-07-07T10:41:48Z | |
| dc.description | Two-pion transitions in charmonium and bottomonium are considered with the leading relativistic effects taken into account. The contribution of the chromo- magnetic interaction of the charmed quarks to the amplitude of the decay $ψ(2S) \to ππJ/ψ$ is estimated from the available data. This contribution is enhanced by a factor of three in the decay $η_c(2S) \to ππη_c$ and should produce a noticeable modification of the rate and the spectrum in the latter decay. It is argued that the peculiar observed spectrum in the decay $Υ(3S) \to ππΥ$ arises due to a dynamical suppression of the leading nonrelativistic quarkonium amplitude and thus enhanced prominence of the relativistic terms. Also discussed are the effects of the final state interaction between the pions. | |
| dc.description | 23 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0606258 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0606258 | |
| dc.identifier | Phys.Rev.D74:054022,2006 | |
| dc.identifier | doi:10.1103/PhysRevD.74.054022 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/181741 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Two-pion transitions in quarkonium revisited | |
| dc.type | text |