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First measurement of direct f0(980) photoproduction on the proton

Collaboration
Nov, 2008
6 pages
Published in:
  • Phys.Rev.Lett. 102 (2009) 102001
e-Print:
DOI:
Report number:
  • JLAB-PHY-08-890
Experiments:
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20092013201720212024012345
Abstract: (arXiv)
We report on the results of the first measurement of exclusive f0(980)f_0(980) meson photoproduction on protons for Eγ=3.0−3.8E_\gamma=3.0 - 3.8 GeV and −t=0.4−1.0-t = 0.4-1.0 GeV2^2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The resonance was detected via its decay in the π+π−\pi^+ \pi^- channel by performing a partial wave analysis of the reaction γp→pπ+π−\gamma p \to p \pi^+ \pi^-. Clear evidence of the f0(980)f_0(980) meson was found in the interference between PP and SS waves at Mπ+π−∼1M_{\pi^+ \pi^-}\sim 1 GeV. The SS-wave differential cross section integrated in the mass range of the f0(980)f_0(980) was found to be a factor of 50 smaller than the cross section for the ρ\rho meson. This is the first time the f0(980)f_0(980) meson has been measured in a photoproduction experiment.
  • 13.60.Le
  • 14.40.Cs
  • 11.80.Et
  • photon p: exclusive reaction
  • f0(980): photoproduction
  • f0(980): hadronic decay
  • pi: pair production
  • differential cross section
  • partial wave analysis
  • CLAS
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