Diffractive two-meson electroproduction with a nucleon and deuteron target

Abstract

The diffractive electro- or photo-production of two mesons separated by a large rapidity gap gives access to generalized parton distributions (GPDs) in a very specific way. First, these reactions allow to easily access the chiral-odd transversity quark GPDs by selecting one of the produced vector meson to be transversely polarized. Second, they are only sensitive to the so-called ERBL region where GPDs are not much constrained by forward quark distributions. Third, the skewness parameter $\xi$ is not related to the Bjorken $x_{\text{Bj}}$ variable, but to the size of the rapidity gap. We analyze different channels (${\rho }_L^0{\rho }_{L/T},{\rho }_L^0{\omega }_{L/T}$ and ${\rho }_L^0\pi$ production) on nucleon and deuteron targets. The analysis is performed in the kinematical domain where a large momentum transfer from the photon to the diffractively produced vector meson introduces a hard scale (the virtuality of the exchanged hard Pomeron). This enables the description of the hadronic part of the process in the framework of collinear factorization of GPDs. We show that the unpolarized cross sections depend very much on the parameterizations of both chiral-even and chiral-odd quark distributions of the nucleon, as well as on the shape of the meson distribution amplitudes. The rates are shown to be in the range of the capacities of a future electron-ion collider.

20 pages, 15 figures

References in corpus (43)

• An accurate nucleon-nucleon potential with charge-independence breaking
• Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD
• Generalized Parton Distributions
• A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector
• $B\to V{\ell }^{+}{\ell }^{-}$ in the Standard Model from Light-Cone Sum Rules
• Skewed and double distributions in pion and nucleon
• Deeply virtual electroproduction of photons and mesons on the nucleon : leading order amplitudes and power corrections
• Imaging dynamical chiral symmetry breaking: pion wave function on the light front
• The $\rho$ Meson Light-Cone Distribution Amplitudes of Leading Twist Revisited
• The role of the quark and gluon GPDs in hard vector-meson electroproduction
• Improving the Weizsäcker-Williams Approximation in Electron-Proton Collisions
• An attempt to understand exclusive pi+ electroproduction
• Generalized parton distributions with helicity flip
• Transversity in hard exclusive electroproduction of pseudoscalar mesons
• Transverse spin structure of the nucleon from lattice QCD simulations
• An AdS/QCD holographic wavefunction for the rho meson and diffractive rho meson electroproduction
• Meson Transition Form Factors in Light-Front Holographic QCD
• Generalized parton distributions in the deuteron
• From hard exclusive meson electroproduction to deeply virtual Compton scattering
• Probing chiral-odd GPD's in diffractive electroproduction of two vector mesons
• Nucleon Tensor Charge from Exclusive ${\pi }^o$ Electroproduction
• Positivity Constraints for off-Forward Parton Distributions
• Deep Electroproduction of Photons and Mesons on the Deuteron
• Virtual Compton Scattering Off Protons at Moderately Large Momentum Transfer
• Transversity Distribution Does Not Contribute to Hard Exclusive Electroproduction of Mesons
• Exclusive electroproduction of vector mesons and transversity distributions
• Hard photoproduction of a diphoton with a large invariant mass
• Test of two new parameterizations of the Generalized Parton Distribution $H$
• Diffractive $\rho$ and $\varphi$ production at HERA using an AdS/QCD holographic light-front meson wavefunction
• Transversity GPD in photo- and electroproduction of two vector mesons
• Electroproduction of a large invariant mass photon pair
• Nonperturbative strange-quark sea from lattice QCD, light-front holography, and meson-baryon fluctuation models
• 3D Structure and Nuclear Targets
• Vector Meson Photoproduction from the BFKL Equation I: Theory
• Transversity generalized parton distributions for the deuteron
• Easy as ${\pi }^o$: On the Interpretation of Recent Electroproduction Results
• Vector Meson Photoproduction from the BFKL Equation II: Phenomenology
• Coherent deeply virtual Compton scattering off ${}^4$He
• Exclusive neutrino-production of a charmed meson
• Diffractive deeply virtual Compton scattering
• Polynomiality sum rules for generalized parton distributions of spin-1 targets
• Spin-flavor structure of chiral-odd GPDs in the large-N_c limit
• Nucleon strangeness polarization from $\Lambda /\bar{\Lambda }$ hyperon production in polarized proton-proton collision at RHIC

Cited by in corpus (3)

• Transversity GPDs of the proton from lattice QCD
• Diffractive rho + lepton pair production at an electron-ion collider
• Accessing quark GPDs in diffractive events at an electron-ion collider