Study of the process e+ e- ---> eta gamma in center-of-mass energy range 600-MeV to 1380-MeV at CMD-2
Mar, 200117 pages
Published in:
- Phys.Lett.B 509 (2001) 217-226
e-Print:
- hep-ex/0103043 [hep-ex]
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Abstract: (Elsevier)
The cross section of the process e + e − → ηγ has been measured in the 600–1380 MeV c.m. energy range with the CMD-2 detector. The following branching ratios have been determined: B ( ρ → ηγ )=(3.28±0.37±0.23)×10 −4 , B ( ω → ηγ )=(5.10±0.72±0.34)×10 −4 , B ( φ → ηγ )=(1.287±0.013±0.063)×10 −2 . Evidence for the ρ (1450)→ ηγ decay has been obtained for the first time.Note:
- 17pages, 4 figures, submited to Phys.Lett.B
- electron positron: colliding beams
- electron positron: annihilation
- eta: electroproduction
- photon: associated production
- eta: hadronic decay
- channel cross section: energy dependence
- vector meson: intermediate state
- vector meson: radiative decay
- vector meson: branching ratio
- rho(770)
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