Radiative Decay of Vector Quarkonium: Constraints on Glueballs and Light Gluinos
| dc.creator | Cakir, M. B. | |
| dc.creator | Farrar, G. R. | |
| dc.date | 1994-02-01 | |
| dc.date | 1994-02-04 | |
| dc.date.accessioned | 2026-07-07T10:35:03Z | |
| dc.date.available | 2026-07-07T10:35:03Z | |
| dc.description | Given a resonance of known mass, width, and J^{PC}, we can determine its gluonic branching fraction, b(R->gg), from data on its production in radiative vector quarkonium decay, V -> gamma+R. For most resonances b(R->gg) is found to be O(10%), consistent with being q-qbar states, but we find that both pseudoscalars observed in the 1440 MeV region have b(R->gg) ~ 1/2 - 1, and b(f_0^{++}->gg) ~ 1/2. As data improves, b(R->gg) should be a useful discriminator between q-qbar and gluonic states and may permit quantitative determination of the extent to which a particular resonance is a mixture of glueball and q-qbar. We also examine the regime of validity of pQCD for predicting the rate of V -> gamma+eta_gluino, the ``extra'' pseudoscalar bound state which would exist if there were light gluinos. From the CUSB limit on peaks in Upsilon -> gamma X, the mass range 3 GeV < m(eta_gluino) < 7 GeV can be excluded. An experiment must be significantly more sensitive to exclude an eta_gluino lighter than this. | |
| dc.description | 36pp (inc figs),RU-94-04. (Replaces original which didn't latex correctly and didn't have figures.) | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9402203 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9402203 | |
| dc.identifier | Phys.Rev.D50:3268-3278,1994 | |
| dc.identifier | doi:10.1103/PhysRevD.50.3268 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/179639 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Radiative Decay of Vector Quarkonium: Constraints on Glueballs and Light Gluinos | |
| dc.type | text |