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.

arXiv comment14 pages

References in corpus (14)

• The Status of Glueballs
• The Pomeron contribution to p p and p bar p scattering in AdS/QCD
• The spin dependence of high energy proton scattering
• A Model for Soft High-Energy Scattering: Tensor Pomeron and Vector Odderon
• Single Spin Asymmetry $A_N$ in Polarized Proton-Proton Elastic Scattering at $\sqrt{s}=200$ GeV
• Exclusive central diffractive production of scalar and pseudoscalar mesons; tensorial vs. vectorial pomeron
• Central exclusive diffractive production of ${\pi }^{+}{\pi }^{-}$ continuum, scalar and tensor resonances in $pp$ and $p\bar{p}$ scattering within tensor pomeron approach
• Photoproduction of pi+ pi- pairs in a model with tensor-pomeron and vector-odderon exchange
• Evidence that the Pomeron transforms as a non-conserved vector current
• The ${\rho }^0$ and Drell-Söding contributions to central exclusive production of ${\pi }^{+}{\pi }^{-}$ pairs in proton-proton collisions at high energies
• Central production of mesons: Exotic states versus Pomeron structure
• Exclusive diffractive production of ${\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$ via the intermediate $\sigma \sigma$ and $\rho \rho$ states in proton-proton collisions within tensor pomeron approach
• Pomeron Interactions from the Einstein-Hilbert Action
• Exclusive central diffractive production of scalar, pseudoscalar and vector mesons

Cited by in corpus (29)

• Heavy Ion Collisions: Achievements and Challenges
• Gluon matter distribution in the proton and pion from extended holographic light-front QCD
• Towards a complete study of central exclusive production of $K^{+}{K}^{-}$ pairs in proton-proton collisions within the tensor Pomeron approach
• The Tensor Pomeron and Low-x Deep Inelastic Scattering
• Central exclusive diffractive production of $K^{+}{K}^{-}{K}^{+}{K}^{-}$ via the intermediate $\varphi \varphi$ state in proton-proton collisions
• Spin-dependent Pomeron and Odderon in elastic proton-proton scattering
• Nonperturbative quark-antiquark interactions in mesonic form factors
• Central exclusive diffractive production of $p\bar{p}$ pairs in proton-proton collisions at high energies
• Central exclusive diffractive production of axial-vector $f_1(1285)$ and $f_1(1420)$ mesons in proton-proton collisions
• Central production of ${\rho }^0$ in $pp$ collisions with single proton diffractive dissociation at the LHC
• Searching for the odderon in $pp\to pp{K}^{+}{K}^{-}$ and $pp\to pp{\mu }^{+}{\mu }^{-}$ reactions in the $\varphi (1020)$ resonance region at the LHC
• Phase diagram of helically imbalanced QCD matter
• Extracting the pomeron-pomeron-$f_2(1270)$ coupling in the $pp\to pp{\pi }^{+}{\pi }^{-}$ reaction through angular distributions of the pions
• High-energy $\pi \pi$ scattering without and with photon radiation
• 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
• Lectures on nonperturbative QCD ( Nonperturbative Topological Phenomena in QCD and Related Theories)
• Central exclusive diffractive production of a single photon in high-energy proton-proton collisions within the tensor-Pomeron approach
• Multi-parton interactions and rapidity gap survival probability in jet-gap-jet processes
• How to observe the QCD instanton/sphaleron processes at hadron colliders?
• Tensor pomeron, vector odderon and diffractive production of meson and baryon pairs in proton-proton collisions
• Deeply virtual Compton scattering in 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
• Elastic Hadron Scattering in Various Pomeron Models
• Effects of odderon spin on helicity amplitudes in $pp$ elastic scattering
• Central exclusive production of $K^{+}{K}^{-}$ pairs in proton-proton collisions
• Searching for Odderon in Central Exclusive Processes at the LHC