Determination of nucleon and pion form factors via dispersion relations

✍ Scribed by R Baldini; S Dubnička; P Gauzzi; S Pacetti; E Pasqualucci; Y Srivastava

• Book ID: 104333468
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 309 KB
• Volume: 666-667
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(00)00008-7

✦ Synopsis

A practical strategy is presented and successfully implemented to determine form factors in the time-like but unphysical (below threshold) region using dispersion relations, in a model independent way without any bias towards expected resonances. Space and timelike data have been employed along with a regularization scheme to unfold and solve the integral equations. Remarkably, resonance structures with peaks for the p(770), p'(1600) and a structure near the N/V threshold are automatically generated. The • peak is invisible thus refuting suggestions about any sizeable sg content in the nucleon.