Helicity in proton-proton elastic scattering and the spin structure of the pomeron

• Verfasst von: Ewerz, Carlo [VerfasserIn]
• Verfasst von: Nachtmann, Otto [VerfasserIn]
• Titel: Helicity in proton-proton elastic scattering and the spin structure of the pomeron
• Verf.angabe: Carlo Ewerz, Piotr Lebiedowicz, Otto Nachtmann, Antoni Szczurek
• E-Jahr: 2016
• Jahr: 2 November 2016
• Umfang: 6 S.
• Fussnoten: Gesehen am 22.11.2017
• Titel Quelle: Enthalten in: Physics letters / B
• Ort Quelle: Amsterdam : North-Holland Publ., 1967
• Jahr Quelle: 2016
• Band/Heft Quelle: 763(2016), Seite 382-387
• ISSN Quelle: 1873-2445
• DOI: doi:10.1016/j.physletb.2016.10.064
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565621158

Abstract

We discuss different models for the spin structure of the nonperturbative pomeron: scalar, vector, and rank-2 symmetric tensor. The ratio of single-helicity-flip to helicity-conserving amplitudes in polarised high-energy proton-proton elastic scattering, known as the complex r5 parameter, is calculated for these models. We compare our results to experimental data from the STAR experiment. We show that the spin-0 (scalar) pomeron model is clearly excluded by the data, while the vector pomeron is inconsistent with the rules of quantum field theory. The tensor pomeron is found to be perfectly consistent with the STAR data.