Exclusive meson pair production in gamma* gamma scattering at small momentum transfer

Abstract

We study the exclusive production of pi pi and rho pi in hard gamma* gamma scattering in the forward kinematical region where the virtuality of one photon provides us with a hard scale in the process. The newly introduced concept of Transition Distribution Amplitudes (TDA) is used to perform a QCD calculation of these reactions thanks to two simple models for TDAs. Cross sections for rho pi and pi pi production are evaluated and compared to the possible background from the Bremsstrahlung process. This picture may be tested at intense electron-positron colliders such as CLEO and B factories. The cross section e gamma -> e' pi0 pi0 is finally shown to provide a possible determination of the pi0 axial form factor, FA, at small t, which seems not to be measurable elsewhere.

arXiv comment16 pages, 13 figures, LaTeX

References in corpus (48)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Gauge-Invariant Decomposition of Nucleon Spin and Its Spin-Off
• Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD
• Generalized Parton Distributions
• Nonforward Parton Distributions
• Factorization for hard exclusive electroproduction of mesons in QCD
• Double distributions and evolution equations
• The $\rho$ Meson Light-Cone Distribution Amplitudes of Leading Twist Revisited
• Probing partonic structure in gamma* gamma -> pi pi near threshold
• Evolution and models for skewed parton distributions
• Testing the handbag contribution to exclusive virtual Compton scattering
• Exclusive production of pion pairs in gamma^* gamma collisions at large Q^2
• Precision Measurements of the Timelike Electromagnetic Form Factors of Pion, Kaon, and Proton
• Twist-three effects in two-photon processes
• Probing chiral-odd GPD's in diffractive electroproduction of two vector mesons
• Analytic coupling and Sudakov effects in exclusive processes: pion and ${\gamma }^{\ast }\gamma \to {\pi }^0$ form factors
• $\pi \to l\nu \gamma$ Form Factors at Two-loop
• Generalized parton distributions of the pion in a Bethe-Salpeter approach
• On the Evolution Kernels of Twist 2 Light-Ray Operators for Unpolarized and Polarized Deep Inelastic Scattering
• Form Factors and QCD in Spacelike and Timelike Region
• Hadron annihilation into two photons and backward dVCS in the scaling regime of QCD
• QCD analysis of bar p N -> gamma* pi in the scaling limit
• Timelike form factors at high energy
• Hadronic Form Factors and Perturbative QCD
• Transversity Distribution Does Not Contribute to Hard Exclusive Electroproduction of Mesons
• Exclusive electroproduction of vector mesons and transversity distributions
• Hunting the QCD-Odderon in hard diffractive electroproduction of two pions
• Precise Measurement of the Pion Axial Form Factor in the Pi+ -> e+ nu gamma Decay
• Impact-parameter dependence of the generalized parton distribution of the pion in chiral quark models
• The pion form factor: Sudakov suppressions and intrinsic transverse momentum
• Light Cone Sum Rules for gamma* N -> Delta Transition Form Factors
• Transversity GPD in photo- and electroproduction of two vector mesons
• Search for isotensor exotic meson and twist 4 contribution to ${\gamma }^{\ast }\gamma \to \rho \rho$
• Angular distributions in hard exclusive production of pion pairs
• Impact Representation of Generalized Distribution Amplitudes
• Double diffractive rho-production in gamma^* gamma^* collisions
• On $\gamma {\gamma }^{\ast }$ production of two ${\rho }^0$ mesons
• Estimates for Pion-Photon Transition Distributions
• A Model for the Off-forward Structure Functions of the Pion
• Off-diagonal quark distribution functions of the pion within an effective single instanton approximation
• A Model for the Pion Structure Function
• Possibility of the odderon discovery via observation of charge asymmetry in the diffractive pi+pi- production at HERA
• Perturbative logarithms and power corrections in QCD hadronic functions. A unifying approach
• Vector meson photoproduction and problem of gauge invariance
• Power corrections to the process ${\gamma }^{\ast }\gamma \to \pi \pi$ in the running coupling method
• Pion Generalized Distribution Amplitudes in the Nonlocal Chiral Quark Model
• Quark Distribution in Pion within Instanton Liquid Model
• Probing Transversity in Electroproduction of Two Vector Mesons

Cited by in corpus (27)

• NLO corrections to timelike, spacelike and double deeply virtual Compton scattering
• Gravitational and higher-order form factors of the pion in chiral quark models
• Hard exclusive electroproduction of a pion in the backward region
• Deeply virtual Compton scattering on a virtual pion target
• Production of a pion in association with a high-Q2 dilepton pair in antiproton-proton annihilation at GSI-FAIR
• Generalized Quark Transversity Distribution of the Pion in Chiral Quark Models
• πN transition distribution amplitudes: Their symmetries and constraints from chiral dynamics
• Pion-photon Transition Distribution Amplitudes in the Spectral Quark Model
• The Pion-Photon Transition Distribution Amplitudes in the Nambu-Jona Lasinio Model
• Deeply Virtual Compton Scattering on a Photon and Generalized Parton Distributions in the Photon
• Parton content of the nucleon from distribution amplitudes and transition distribution amplitudes
• Backward DVCS and Proton to Photon Transition Distribution Amplitudes
• Covariant Non-local Chiral Quark Model and Pion-photon Transition Distribution Amplitudes
• Transversity form factors of the pion in chiral quark models
• Enhancement effects in exclusive $\pi \pi$ and $\rho \pi$ production in ${\gamma }^{\ast }\gamma$ scattering
• Pion pair production in $e^{+}{e}^{-}$ annihilation
• Duality between different mechanisms of QCD factorization in γ^*γcollisions
• A note on the QCD evolution of generalized form factors
• QCD factorizations in gamma* gamma* -> rho rho
• Pion-Photon TDAs in the NJL Model
• Hard exclusive reactions and hadron structure
• Transition Distribution Amplitudes for gamma* gamma collisions
• Timelike Virtual Compton Scattering from Electron-Positron Radiative Annihilation
• Generalized Parton Distributions of Pions. Spin Structure of Hadrons
• Electron-Positron Radiative Annihilation : Timelike Virtual Compton Scattering
• On the physical Relevance of the Study of gamma* gamma -> pi0 pi0 at small t and large Q2
• QCD Factorizations in Exclusive gamma* gamma* -> rho0_L rho0_L