Heidelberg 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 85: Beyond the Standard Model (Theory) 2 and QFT and Lattice Gauge Theory 1
T 85.8: Vortrag
Donnerstag, 24. März 2022, 18:00–18:15, T-H16
High-energy diffractive processes without and with soft photon radiation and Low’s theorem — •Piotr Lebiedowicz1, Otto Nachtmann2, and Antoni Szczurek1 — 1Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland — 2Institut für Theoretische Physik, Universität Heidelberg, Heidelberg, Germany
Exclusive high-energy reactions at small momentum transfer without and with soft photon radiation are discussed. The tensor-pomeron model describing such reactions involving hadrons is introduced. The tensor-pomeron model is for hadronic high-energy reactions and has its origin in general investigations of the soft, nonperturbative, pomeron in QCD. The emission of soft radiation provides a fundamental probe of the consistency of the underlying Quantum Field Theory. As an example pion-pion scattering without and with soft photon emission is considered. The “exact” model results are compared to soft photon approximations based on Low’s theorem. The term of order (photon energy)0 in the expansion of the photon emission amplitude needs to be changed compared to Low’s result.