Hard photoproduction of a diphoton with a large invariant mass

Abstract

The electromagnetic probe has proven to be a very efficient way to access the $3-$dimensional structure of the nucleon, particularly thanks to the exclusive Compton processes. We explore the hard photoproduction of a large invariant mass diphoton in the kinematical regime where the diphoton is nearly forward and its invariant mass is the hard scale enabling to factorize the scattering amplitude in terms of generalized parton distributions. This amplitude has a very peculiar and interesting analytic structure. We calculate unpolarized cross sections and the angular asymmetry triggered by a linearly polarized photon beam.

arXiv comment8 pages, 9 figures. Version 2, as to be published in Phys Rev D96, contains minor improvements including a brief comparison of different GPD models and a brief discussion of the very high energy behavior of the cross section. Version 3 includes the erratum published in Phys Rev D100 (2019) no.3, 039901

References in corpus (37)

• 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
• Unraveling hadron structure with generalized parton distributions
• Impact Parameter Dependent Parton Distributions and Off-Forward Parton Distributions for $\zeta \to 0$
• A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector
• Generalized parton distributions in impact parameter space
• Deeply virtual electroproduction of photons and mesons on the nucleon : leading order amplitudes and power corrections
• Proof of Factorization for Deeply Virtual Compton Scattering in QCD
• The role of the quark and gluon GPDs in hard vector-meson electroproduction
• Femto-Photography of Protons to Nuclei with Deeply Virtual Compton Scattering
• Photon Distribution Amplitudes in QCD
• Timelike Compton scattering: exclusive photoproduction of lepton pairs
• Testing the handbag contribution to exclusive virtual Compton scattering
• On the gauge invariance of the DVCS amplitude
• Twist-three effects in two-photon processes
• From hard exclusive meson electroproduction to deeply virtual Compton scattering
• Probing chiral-odd GPD's in diffractive electroproduction of two vector mesons
• QCD factorization of exclusive processes beyond leading twist: gamma*T -> rhoT impact factor with twist three accuracy
• NLO corrections to timelike, spacelike and double deeply virtual Compton scattering
• On timelike and spacelike deeply virtual Compton scattering at next to leading order
• On timelike and spacelike hard exclusive reactions
• Deeply Virtual Compton Scattering to the twist-four accuracy: Impact of finite-$t$ and target mass corrections
• Finite-t and target mass corrections to deeply virtual Compton scattering
• Exclusive photoproduction of a $\gamma \rho$ pair with a large invariant mass
• Kinematic power corrections in off-forward hard reactions
• Can one measure timelike Compton scattering at LHC ?
• Transversity GPD in photo- and electroproduction of two vector mesons
• Photoproduction of a pi rhoT pair with a large invariant mass and transversity generalized parton distribution
• Novel two-to-three hard hadronic processes and possible studies of generalized parton distributions at hadron facilities
• On the description of exclusive processes beyond the leading twist approximation
• Exclusive photoproduction of hard dijets and magnetic susceptibility of QCD vacuum
• Probing the nucleon's transversity and the photon's distribution amplitude in lepton pair photoproduction
• PARTONS: PARtonic Tomography Of Nucleon Software. A computing framework for the phenomenology of Generalized Parton Distributions
• Timelike Compton scattering with a linearly polarized photon beam
• On timelike Compton scattering at medium and high energies

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• Phenomenology of double deeply virtual Compton scattering in the era of new experiments
• Collinear factorization of diphoton photoproduction at next to leading order
• Extraction of the Parton Momentum-Fraction Dependence of Generalized Parton Distributions from Exclusive Photoproduction
• Accessing chiral-even quark generalised parton distributions in the exclusive photoproduction of a $\gamma {\pi }^{\pm }$ pair with large invariant mass in both fixed-target and collider experiments
• Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab
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• Moments of Axial-Vector GPD from Lattice QCD: Quark Helicity, Orbital Angular Momentum, and Spin-Orbit Correlation
• NLO corrections to the deeply virtual meson production revisited: impact on the extraction of generalized parton distributions
• Determination of generalized parton distributions through a simultaneous analysis of axial form factor and wide-angle Compton scattering data
• Impact of JLab data on the determination of GPDs at zero skewness and new insights from transition form factors $N\to \Delta$
• Extracting transition generalized parton distributions from hard exclusive pion-nucleon scattering
• Exclusive photoproduction of ${\eta }_c\gamma$ pairs with large invariant mass
• Diffractive two-meson electroproduction with a nucleon and deuteron target
• Diffractive $\gamma \gamma$ production in $pp$ collisions at the LHC
• Deeply virtual meson production on neutrons
• Phenomenology of diphoton photoproduction at next-to-leading order
• Photoproduction of ${\eta }_c\gamma$ pairs in CGC framework
• Unified and optimal frame choice for generalized parton distributions
• Physics with high-luminosity proton-nucleus collisions at the LHC
• Exploring GPDs through the photoproduction of a $\gamma \rho$ pair
• Exclusive production of a large mass photon pair
• New framework for extracting GPDs from exclusive photon electroproduction
• Factorization in hard exclusive processes. Computation of one-loop corrections to the diphoton photoproduction on proton