Hadron annihilation into two photons and backward dVCS in the scaling regime of QCD

Abstract

We study the scaling regime of hadron-(anti)-hadron annihilation into a deeply virtual photon and a real photon, H anti-H -> gamma^* gamma, and deep backward virtual Compton scattering, gamma^* H -> H gamma. We advocate that there is a kinematical region where the scattering amplitude factorizes into a short-distance matrix element and a long-distance dominated object: a transition distribution amplitude which describes the hadron to photon transition.

arXiv comment4 pages, 1 .eps figure, to be published in Phys. Rev. D Rapid Comm

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Cited by in corpus (53)

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• Gravitational and higher-order form factors of the pion in chiral quark models
• Leading Chiral Corrections to the Nucleon Generalized Parton Distributions
• Hard exclusive electroproduction of a pion in the backward region
• Search for isotensor exotic meson and twist 4 contribution to ${\gamma }^{\ast }\gamma \to \rho \rho$
• Deeply virtual Compton scattering on a virtual pion target
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• Parton content of the nucleon from distribution amplitudes and transition distribution amplitudes
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• QCD description of charmonium plus light meson production in antiproton-nucleon annihilation
• Backward DVCS and Proton to Photon Transition Distribution Amplitudes
• Progress and Opportunities in Backward angle (u-channel) Physics
• Extraction of beam-spin asymmetries from the hard exclusive ${\pi }^{+}$ channel off protons in a wide range of kinematics
• Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab
• Covariant Non-local Chiral Quark Model and Pion-photon Transition Distribution Amplitudes
• QCD description of backward vector meson hard electroproduction
• Transversity form factors of the pion in chiral quark models
• Double handbag description of proton-antiproton annihilation into a heavy meson pair
• u-Channel Color Transparency Observables
• Real and Virtual Nucleon Compton Scattering in the Perturbative Limit
• Enhancement effects in exclusive $\pi \pi$ and $\rho \pi$ production in ${\gamma }^{\ast }\gamma$ scattering
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• Hard exclusive neutrino production of a light meson
• Pion pair production in $e^{+}{e}^{-}$ annihilation
• Duality between different mechanisms of QCD factorization in γ^*γcollisions
• Backward timelike Compton scattering to decipher the photon content of the nucleon
• A note on the QCD evolution of generalized form factors
• QCD factorizations in gamma* gamma* -> rho rho
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• Unitarity constraints on meson electroproduction at backward angles
• Spin Observables in Transition-Distribution-Amplitude Studies
• A QCD analysis of \bar p N -> gamma^* pi and \bar p N -> gamma^* gamma. Where is the pion in the proton ?
• Hard exclusive reactions and hadron structure
• Transition Distribution Amplitudes for gamma* gamma collisions
• Baryon-to-meson transition distribution amplitudes: formalism and models
• Single Transverse-Spin Asymmetry in Hard-Exclusive Meson Electroproduction in the Backward Region
• Toward an advanced phenomenology of $\pi N$ transition distribution amplitudes
• Baryon to meson transition distribution amplitudes and their spectral representation
• QCD Factorizations in Exclusive gamma* gamma* -> rho0_L rho0_L
• On the physical Relevance of the Study of gamma* gamma -> pi0 pi0 at small t and large Q2
• Duality and Factorization Theorem in QCD
• Virtual Compton Scattering and Neutral Pion Electroproduction in the Resonance Region up to the Deep Inelastic Region at Backward Angles