High-energy ππ scattering without and with photon radiation

• Verfasst von: Lebiedowicz, Piotr [VerfasserIn]
• Verfasst von: Nachtmann, Otto [VerfasserIn]
• Verfasst von: Szczurek, Antoni [VerfasserIn]
• Titel: High-energy ππ scattering without and with photon radiation
• Verf.angabe: Piotr Lebiedowicz, Otto Nachtmann, and Antoni Szczurek
• E-Jahr: 2022
• Jahr: 24 January 2022
• Umfang: 40 S.
• Fussnoten: Gesehen am 14.09.2022
• Titel Quelle: Enthalten in: Physical review
• Ort Quelle: Woodbury, NY : Inst., 2016
• Jahr Quelle: 2022
• Band/Heft Quelle: 105(2022), 1 vom: 1. Jan., Artikel-ID 014022, Seite 1-40
• ISSN Quelle: 2470-0029
• DOI: doi:10.1103/PhysRevD.105.014022
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1816621722

Abstract

We discuss the processes ππ→ππ and ππ→ππγ from a general quantum field theory (QFT) point of view. In the soft-photon limit where the photon energy ω→0 we study the theorem due to F.E. Low. We confirm his result for the 1/ω term of the ππ→ππγ amplitude but disagree for the ω0 term. We analyze the origin of this discrepancy. Then we calculate the amplitudes for the above reactions in the tensor-Pomeron model. We identify places where “anomalous” soft photons could come from. Three soft-photon approximations (SPAs) are introduced. The corresponding SPA results are compared to those obtained from the full tensor-Pomeron model for c.m. energies √s=10 GeV and 100 GeV. The kinematic regions where the SPAs are a good representation of the full amplitude are determined. Finally we make some remarks on the type of fundamental information one could obtain from high-energy exclusive hadronic reactions without and with soft photon radiation.