Helicity in Proton-Proton Elastic Scattering and the Spin Structure of the Pomeron

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 r_5 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.

14 pages

References in corpus (5)

• The Status of Glueballs
• Single Spin Asymmetry $A_N$ in Polarized Proton-Proton Elastic Scattering at $\sqrt{s}=200$ GeV
• Photoproduction of pi+ pi- pairs in a model with tensor-pomeron and vector-odderon exchange
• The ${\rho }^0$ and Drell-Söding contributions to central exclusive production of ${\pi }^{+}{\pi }^{-}$ pairs in proton-proton collisions at high energies
• Exclusive central diffractive production of scalar, pseudoscalar and vector mesons

Cited by in corpus (12)

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• Open-string singlet interaction as pomeron in elastic $pp,p\bar{p}$ scattering
• Dark photon production via elastic proton bremsstrahlung with non-zero momentum transfer
• Polarized gluon distribution in the proton from holographic light-front QCD
• Soft-photon radiation in high-energy proton-proton collisions within the tensor-Pomeron approach: Bremsstrahlung
• Central exclusive diffractive production of a single photon in high-energy proton-proton collisions within the tensor-Pomeron approach
• Polarization Measurements of $p^{\uparrow }$ and ${}^3$He${}^{\uparrow }$ Beams at RHIC and Future EIC Using the Polarized Atomic Hydrogen Gas Jet Target
• Deeply virtual Compton scattering in the tensor-pomeron approach
• Effects of odderon spin on helicity amplitudes in $pp$ elastic scattering
• Elastic Hadron Scattering in Various Pomeron Models
• Searching for Odderon in Central Exclusive Processes at the LHC