Transition Distribution Amplitudes for γ⋆γ collisions

✍ Scribed by J.P. Lansberg; B. Pire; L. Szymanowski

• Book ID: 103870408
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 289 KB
• Volume: 184
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/j.nuclphysbps.2008.09.172

✦ Synopsis

We study the exclusive production of ππ and ρπ in hard γ γ scattering in the forward kinematical region where the virtuality of one photon provides us with a hard scale in the process. The newly introduced concept of Transition Distribution Amplitudes (TDA) is used to perform a QCD calculation of these reactions thanks to two simple models for TDAs. The sizable cross sections for ρπ and ππ production may be tested at intense electron-positron colliders such as CLEO and B factories (Belle and BaBar).