Odderon and photon exchange in pseudoscalar meson production

• Verfasst von: Berger, Edgar R. [VerfasserIn]
• Verfasst von: Nachtmann, Otto [VerfasserIn]
• Titel: Odderon and photon exchange in pseudoscalar meson production
• Verf.angabe: E.R. Berger and O. Nachtmann, Theoretische Physik, Universität Heidelberg, Philosophenweg 16, D-69120 Heidelberg, Germany
• Jahr des Originals: 1999
• Umfang: 3 S.
• Fussnoten: Gesehen am 07.03.2018
• Titel Quelle: Enthalten in: Nuclear physics <Amsterdam> / B / Proceedings supplements
• Jahr Quelle: 2000
• Band/Heft Quelle: 79(1999), 1, S. 352-354
• ISSN Quelle: 1873-3832
• DOI: doi:10.1016/S0920-5632(99)00721-5
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1570583153

Abstract

We consider exclusive π0 production in ep-scattering. At high energies odderon and photon exchange contribute. The photon exchange contribution is evaluated exactly using data for the total virtual photon-proton absorption cross section. The odderon exchange contribution is calculated in nonperturbative QCD, using functional integral techniques and the model of the stochastic vacuum. For the proton we assume a quark-diquark structure as suggested by the small odderon amplitude in pp and pp forward scattering. We show that odderon exchange leads to a much larger inelastic than elastic π0 production cross section. Observing our process at HERA would establish the soft odderon.