Exclusive Photon-Photon Processes
| dc.creator | Brodsky, S. J. | |
| dc.date | 1997-08-13 | |
| dc.date.accessioned | 2026-07-07T04:02:16Z | |
| dc.date.available | 2026-07-07T04:02:16Z | |
| dc.description | Exclusive $γγ\to$ hadron pairs are among the most fundamental processes in QCD, providing a detailed examination of Compton scattering in the crossed channel. In the high momentum transfer domain $(s,t, {large},θ_{cm}$ for $t/s$ fixed), these processes can be computed from first principles in QCD, yielding important information on the nature of the QCD coupling $α_s$ and the form of hadron distribution amplitudes. Similarly, the transition form factors $γ^*γ$, $γ^*γ\to π^0, η^0,η^\prime,η_c ...$ provide rigorous tests of QCD and definitive determinations of the meson distribution amplitudes $ϕ_H(x,Q)$. We show that the assumption of a frozen coupling at low momentum transfers can explain the observed scaling of two-photon exclusive processes. | |
| dc.description | LaTex, 15 pages | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9708345 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9708345 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/47156 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Exclusive Photon-Photon Processes | |
| dc.type | text |