S-ware π0 production in pp collisions in a OBE model

✍ Scribed by E. Gedalin; A. Moalem; L. Rasdolskaya

• Book ID: 104337275
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 969 KB
• Volume: 652
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(99)00140-2

✦ Synopsis

The total cross section for the pp --~ pp~O reaction at energies close to threshold is calculated using a covariant one-boson-exchange model, where a boson B created on one of the incoming protons is converted into a neutral pion on the second. The amplitudes for the conversion processes, BN --~ N~r °, are taken to be the sum of s, u and t-channel pole terms. The main contributions 1o the primary production amplitude is due to an effective isoscalar o-meson pole in a t-channel, which is enhanced strongly due to offshellness. With this contribution included the model reproduces, both the scale and energy dependence of the cross section.