Photoproduction of pi+ pi- pairs in a model with tensor-pomeron and vector-odderon exchange

Abstract

We consider the reaction (gamma p) to (pi+ pi- p) at high energies. Our description includes dipion production via the resonances rho, omega, rho-prime and f2, and via non-resonant mechanisms. The calculation is based on a model of high energy scattering with the exchanges of photon, pomeron, odderon and reggeons. The pomeron and the C=+1 reggeons are described as effective tensor exchanges, the odderon and the C=-1 reggeons as effective vector exchanges. We obtain a gauge-invariant version of the Drell-Soeding mechanism which produces the skewing of the rho-meson shape. Starting from the explicit formulae for the matrix element for dipion production we construct an event generator which comprises all contributions mentioned above and includes all interference terms. We give examples of total and differential cross sections and discuss asymmetries which are due to interference of C=+1 and C=-1 exchange contributions. These asymmetries can be used to search for odderon effects. Our model is intended to provide all necessary theoretical tools for a detailed experimental analysis of elastic dipion production for which data exist from fixed target experiments, from HERA, and are now being collected by LHC experiments.

49 pages

References in corpus (4)

• The Physics of Ultraperipheral Collisions at the LHC
• The Odderon in Quantum Chromodynamics
• Observation of Two-source Interference in the Photoproduction Reaction $AuAu\to AuAu{\rho }^0$
• The ${\rho }^0$ and Drell-Söding contributions to central exclusive production of ${\pi }^{+}{\pi }^{-}$ pairs in proton-proton collisions at high energies

Cited by in corpus (18)

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• Central exclusive diffractive production of $K^{+}{K}^{-}{K}^{+}{K}^{-}$ via the intermediate $\varphi \varphi$ state in proton-proton collisions
• ${\eta }_c$ production in photon - induced interactions at the AFTER@LHC experiment as a probe of the Odderon
• Probing the gluon tomography in photoproduction of di-pions
• Coulomb nuclear interference effect in dipion production in ultraperipheral heavy ion 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
• High-energy $\pi \pi$ scattering without and with photon radiation
• Study of central exclusive ${\pi }^{+}{\pi }^{-}$ production in proton-proton collisions at $\sqrt{s}=$ 5.02 and 13 TeV
• 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
• Isolating the Odderon in central production in high energy $pA$ and $AA$ collisions
• Measurement of exclusive pion pair production in proton-proton collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Central exclusive production at the LHC: Remarks by the organisers on an EMMI workshop
• Impact of new results from the ultraperipheral collision on modeling the proton and neutron emission in photon-induced nuclear processes
• Searching for Odderon in Central Exclusive Processes at the LHC