The E687 cryptoexotic vector meson candidate
- 26 Downloads
A new study of the dip observed at 1.9GeV by the Fermilab experiment E687 in diffractive photoproduction of 3π +3π - is presented. The E687 and the BABAR data on the annihilation cross-section σ(e + e -→3π +3π -), obtained with initial-state radiation, are fitted all together. The fit function is based on a simple mixing mechanism that explains the manifestation of a resonance as a dip. Possible interpretations in terms of hybrids and tetraquark states are considered.
PACS.13.40.Hq Electromagnetic decays 13.66.Bc Hadron production in e-e+ interactions 25.20.Lj Photoproduction reactions
Unable to display preview. Download preview PDF.
- 3.R. Baldini, reported at the FENICE Workshop, 1998, Frascati.Google Scholar
- 5.E687 Collaboration (P. Lebrun), FERMILAB-CONF-97-387-E, talk presented at Hadron 97, Upton, USA.Google Scholar
- 8.A. Donnachie, H.G. Dosch, P.V. Landsho, O. Nachtmann, Pomeron Physics and QCD (Cambridge University Press, 2002)Google Scholar
- 12.S.R. Coleman, H.J. Schnitzer, Phys. Rev. 134, B863 (1964)Google Scholar