Radiatively Generated Parton Distributions of Real and Virtual Photons

Abstract

The parton content of real (P^2=0) and virtual (P^2\neq 0) transverse photons γ(P^2) is expressed in terms of perturbative pointlike and nonperturbative hadronic (VMD) components, employing recently updated parton distributions of pions and protons. The resulting parameter-free and perturbatively stable LO and NLO parton densities f^{γ(P^2)}(x,Q^2) are smooth in P^2 and apply to all P^2 >= 0 whenever γ(P^2) is probed at scales Q^2 >> P^2 where transverse photons also dominate physically relevant cross sections. Predictions are given for the structure function F_2^{γ(P^2)}(x,Q^2) and f^{γ(P^2)}(x,Q^2), and are compared with all relevant data for real photons as well as with recent data for virtual photons as extracted from DIS ep dijet events. Simple analytic parametrizations of our predicted parton distributions are presented for the real photon in LO and NLO, and for the virtual photon in LO which, within sufficient accuracy, may be also used in NLO-QCD.

38 pages incl. 11 figures, LaTeX, eq. (13) and eq. (25) changed, numerical results unchanged

Cited by in corpus (79)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Parton-Based Gribov-Regge Theory
• The Structure of the Proton in the LHC Precision Era
• Theory of hard photoproduction
• The Photon Structure from Deep Inelastic Electron-Photon Scattering
• Evidence for Colour-Octet Mechanism from CERN LEP2 gamma gamma -> J/psi + X Data
• Vector Meson Production in Ultraperipheral Heavy Ion Collisions
• Leading-Order Determination of the Gluon Polarization from high-$p_T$ Hadron Electroproduction
• Introduction to the physics of the total cross-section at LHC: A Review of Data and Models
• J/psi plus jet associated production in two-photon collisions at next-to-leading order
• New NLO Parametrizations of the Parton Distributions in Real Photons
• Survey of present data on photon structure functions and resolved photon processes
• Associated Production of Heavy Quarkonia and Electroweak Bosons at Present and Future Colliders
• Jet angularities in photoproduction at the Electron-Ion Collider
• J/psi plus prompt-photon associated production in two-photon collisions at next-to-leading order
• Charmonium production in polarized high-energy collisions
• A New 5-Flavour LO Analysis and Parametrization of Parton Distributions in the Real Photon
• A Comprehensive Approach to Structure Functions
• Strong Coupling Constant from the Photon Structure Function
• JetViP 2.1: the hbook version
• A New 5 Flavour NLO Analysis and Parametrizations of Parton Distributions of the Real Photon
• Spin-Dependent Structure Functions of the Photon
• Estimates for Pion-Photon Transition Distributions
• D* Production in Two-Photon Collisions
• Next-to-next-to-leading order QCD corrections to the photon's parton structure
• Measurement of Di-jet Cross-Sections in Photoproduction and Photon Structure
• Low-mass lepton pair production at large transverse momentum
• Photoproduction of $J/\psi$ in association with a $c\bar{c}$ pair
• Heavy quarkonium photoproduction in ultrarelativistic heavy ion collisions
• $J/\psi +c+\bar{c}$ Photoproduction in $e^{+}{e}^{-}$ Scattering
• Photon structure functions at small $x$ in holographic QCD
• NLO photon parton parametrization using ee and ep data
• Has the QCD RG-Improved Parton Content of Virtual Photons been Observed?
• Electroproduction Cross Section of Large_Et Hadrons at NLO and Virtual Photon Structure Function
• Measurement of the Charm Production Cross Section in gamma gamma Collisions at LEP
• Soft-gluon Resummation for High-pT Inclusive-Hadron Production at COMPASS
• QCD improved parton distribution functions of ${\gamma }_{\mathbf{L}}^{\ast }$
• Deep Inelastic e-gamma Scattering at High Q2
• The dependence of dijet production on photon virtuality in ep collisions at HERA
• The Virtual Photon Structure to the Next-to-next-to-leading Order in QCD
• Inclusive D* Production in Two-Photon Collisions at LEP
• Photon structure function revisited
• Polarized Virtual Photon Structure Function $g_2^{\gamma }$ and Twist-3 Effects in QCD
• Jet Production at HERA
• Deep inelastic scattering and forward neutral pion production at NLO
• Instanton-induced Semi-hard Parton Interactions and Phenomenology of High Energy Hadron Collisions
• Photoproduction of dileptons and photons in p-p collisions at Large Hadron Collider energies
• Inclusive diffractive heavy quarkonium photoproduction in pp, pA and AA collisions
• Measurement of the Cross Section for open b-Quark Production in Two-Photon Interactions at LEP
• Photoproduction of the $B_c$ meson at the future $e^{+}{e}^{-}$ colliders
• Dijet photoproduction of massless charm jets at next-to-leading order of QCD
• Kinematic distributions of the ${\eta }_c$ photoproduction in $ep$ collisions within the nonrelativistic QCD framework
• Heavy Flavour Production in Two-Photon Collisions
• Photoproductions of dileptons, photons, and light vector mesons in p-p, p-Pb, and Pb-Pb collisions at Large Hadron Collider energies
• Minijets, soft gluon resummation and photon cross-sections
• Heavy quark effects on parton distribution functions in the unpolarized virtual photon up to the next-to-leading order in QCD
• Top quark effects on the virtual photon structure function at ILC
• Uncertainties of the CJK 5 Flavour LO Parton Distributions in the Real Photon
• Sum Rules for Parity Violating Compton Amplitudes
• QCD predictions for spin dependent photonic structure function $g_1^{\gamma }(x,Q^2)$ in the low x region of future linear colliders
• J/Ψproduction in two-photon collisions at next-to-leading order
• Parametrisation of F_2^gamma at low Q^2 and of sigma(gamma,gamma) and sigma(gamma^*,gamma) at high energies
• Resummation of large logarithms in the heavy quark effects on the parton distributions inside the virtual photon
• Photoproduction total cross section and shower development
• QCD at Photon Colliders
• The Photon Structure Function at Small-x
• NLO photon parton parametrization
• Photon Structure Function in Supersymmetric QCD Revisited
• Squark Contributions to Photon Structure Functions and Positivity Constraints
• Inclusive diffractive heavy quarkonium photoproduction including quark subprocesses
• Generalized Parton Distributions of Pions. Spin Structure of Hadrons
• Two-Photon Processes and Photon Structure
• Elastic and inelastic $J/\psi$ photoproduction in $p$-$p$ collisions at LHC energies: the feature of Weizsäcker-Williams approximation
• DIS at small x and hadron-hadron scattering at high energies via the holographic Pomeron exchange
• J/Psi production in direct and resolved gamma gamma collisions
• Leading logarithm calculation of the e^+ e^- -> e^+ ν_e \bar{u} d cross section
• Hadronic structure of the photon at small x in holographic QCD
• Next-to-leading order analysis of $J/\psi +\gamma$ production in photon-photon collisions at CEPC