Backward timelike Compton scattering to decipher the photon content of the nucleon

Abstract

The exclusive photoproduction off nucleon of a large invariant mass lepton pair in the backward region specified by the small Mandelstam variable $-u$ is discussed in the framework of collinear QCD factorization. The amplitude is factorized in terms of photon-to-nucleon Transition Distribution Amplitudes (TDAs) which encode the photon content of the nucleon. Model estimates of these new non-perturbative objects are described and the corresponding cross sections calculated. The background due to the electromagnetic Bethe-Heitler process is shown to be negligible in the kinematical regime of interest.

arXiv comment33 pages, 9 figures, 1 table. A major revision of the paper. A sign mistake was corrected in amplitude calculations. This resulted in predicting higher cross section for the bTCS reaction

References in corpus (29)

• The high-precision, charge-dependent Bonn nucleon-nucleon potential (CD-Bonn)
• Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD
• Generalized Parton Distributions
• Unraveling hadron structure with generalized parton distributions
• The Physics of Ultraperipheral Collisions at the LHC
• Physics of Ultra-Peripheral Nuclear Collisions
• Electron-Ion Collider in China
• How bright is the proton? A precise determination of the photon parton distribution function
• Improving the Weizsäcker-Williams Approximation in Electron-Proton Collisions
• The Photon Content of the Proton
• Timelike Compton scattering: exclusive photoproduction of lepton pairs
• Strange vector currents and the OZI-rule
• 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
• Hadron annihilation into two photons and backward dVCS in the scaling regime of QCD
• Can one measure timelike Compton scattering at LHC ?
• Production of a pion in association with a high-Q2 dilepton pair in antiproton-proton annihilation at GSI-FAIR
• The Nucleon Distribution Amplitudes and their application to nucleon form factors and the $N\to \Delta$ transition at intermediate values of $Q^2$
• First-time measurement of Timelike Compton Scattering
• Accessing baryon to meson transition distribution amplitudes in meson production in association with a high invariant mass lepton pair at GSI-FAIR with PANDA
• Hard exclusive pion electroproduction at backward angles with CLAS
• Transition distribution amplitudes and hard exclusive reactions with baryon number transfer
• Backward DVCS and Proton to Photon Transition Distribution Amplitudes
• Extraction of beam-spin asymmetries from the hard exclusive ${\pi }^{+}$ channel off protons in a wide range of kinematics
• Progress and Opportunities in Backward angle (u-channel) Physics
• QCD description of backward vector meson hard electroproduction
• Backward charmonium production in $\pi N$ collisions
• Bootstrap and the physical values of $\pi N$ resonance parameters

Cited by in corpus (1)

• Precision Studies of QCD in the Low Energy Domain of the EIC