Study of the baryon resonances structure via η photoproduction

✍ Scribed by Zhenping Li; Bijan Saghai

• Book ID: 104337143
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 1008 KB
• Volume: 644
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(98)00590-9

✦ Synopsis

Within a quark model the process yp ~ rip, for E~ ab < 1.2 GeV, is investigated. We find that the recent data from GRAAL on the polarized beam asymmetry require significant contributions from the resonances Di3(1520), Fj5(1680), and to a lesser extent from P~3(1720) in addition to those from the dominant S11(1535) resonance, implied by the Mainz differential cross-section data. The contributions from the resonances $11(1650), D13(1700) and D15(1675) are found consistently small but sensitive to the polarized target asymmetry measured recently at ELSA. These results are shown to be consistent with the quark model predictions.