scholarly journals Higher-order kinematical effects in deeply virtual Compton scattering

2021 ◽  
Vol 2021 (12) ◽  
Author(s):  
Yuxun Guo ◽  
Xiangdong Ji ◽  
Kyle Shiells
Keyword(s):  
Compton Scattering ◽  
Cross Section ◽  
Light Cone ◽  
Form Factors ◽  
Deeply Virtual Compton Scattering ◽  
Virtual Compton Scattering ◽  
Higher Order ◽  
Cross Section Formula ◽  
The Cross ◽  
Compton Form Factors

Abstract We study the deeply virtual Compton scattering cross-section in twist-two generalized parton distribution (GPD) approximation, and show that different choices of light-cone vectors and gauges for the final photon polarization will lead to different higher-order kinematical corrections to the cross-section formula. The choice of light-cone vectors affects kinematic corrections at the twist-three level, accounting for the differences between the cross-section formulas in the literature. On the other hand, kinematical corrections from higher-twist GPDs should eliminate the light-cone dependence at twist three. Those light-cone dependencies are studied systematically at JLab 12 GeV and future EIC kinematics. They serve as the intrinsic systematic uncertainties in extracting the Compton form factors through the cross-section formula. More importantly, they are also necessary for understanding cross-section measurements with higher-twist precision and to reconstruct higher-order Compton form factors.

PHOTON STRUCTURE AND DEEPLY VIRTUAL COMPTON SCATTERING IN ELECTRON-PHOTON COLLISION

2005 ◽  
Vol 20 (31) ◽  
pp. 7347-7357
Author(s):  
DAE SUNG HWANG ◽  
TSUNEO UEMATSU
Keyword(s):  
Compton Scattering ◽  
Light Cone ◽  
Axial Vector ◽  
Form Factors ◽  
Deeply Virtual Compton Scattering ◽  
Virtual Compton Scattering ◽  
Vector Form ◽  
Photon Structure ◽  
Electron Photon ◽  
Photon Collision

We study the deeply virtual Compton scattering on the photon target. The light-cone wavefunctions and the axial vector form factors of the photon are analyzed.

Deeply Virtual Compton Scattering in e- e- and e- γ Collisions

2003 ◽  
Vol 18 (16) ◽  
pp. 2787-2796
Author(s):  
Dae Sung Hwang
Keyword(s):  
Compton Scattering ◽  
Light Cone ◽  
Form Factors ◽  
Deeply Virtual Compton Scattering ◽  
Virtual Compton Scattering ◽  
High Energy ◽  
Real Photon ◽  
Parton Distributions ◽  
Generalized Parton Distributions ◽  
Local Operators

The matrix elements of the local operators such as electromagnetic current, energy momentum tensor, angular momentum, and generalized parton distributions have exact representations in terms of light-cone Fock state wavefunctions of bound states such as hadrons. We present formulae which express the form factors of the local operators in terms of the light-cone wavefunctions. We propose the measurement of the generalized parton distributions of the high energy real photon by the deeply virtual Compton scattering experiments.

scholarly journals Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering

2006 ◽  
Vol 97 (26) ◽  
Author(s):  
C. Muñoz Camacho ◽  
A. Camsonne ◽  
M. Mazouz ◽  
C. Ferdi ◽  
G. Gavalian ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Cross Section ◽  
Deeply Virtual Compton Scattering ◽  
Virtual Compton Scattering ◽  
The Cross

scholarly journals Deeply virtual Compton scattering off Helium nuclei with positron beams

2021 ◽  
Vol 57 (9) ◽  
Author(s):  
Sara Fucini ◽  
Mohammad Hattawy ◽  
Matteo Rinaldi ◽  
Sergio Scopetta
Keyword(s):  
Form Factor ◽  
Compton Scattering ◽  
Form Factors ◽  
Deeply Virtual Compton Scattering ◽  
Virtual Compton Scattering ◽  
Internal Target ◽  
The Real ◽  
Positron Beams ◽  
Unpolarized Target ◽  
Compton Form Factors

AbstractPositron initiated deeply virtual Compton scattering (DVCS) off $$^4$$ 4 He and $$^3$$ 3 He nuclei is described. The way the so-called $$d-$$ d - term could be obtained from the real part of the relevant Compton form factor is summarized, and the importance and novelty of this measurement is discussed. The measurements addressed for $$^3$$ 3 He targets could be very useful even in a standard unpolarized target setup, measuring beam spin and beam charge asymmetries only. The unpolarized beam charge asymmetries for DVCS off $$^3$$ 3 He and $$^4$$ 4 He are also estimated, at JLab kinematics and, for $$^4$$ 4 He, also at a configuration typical at the future Electron–Ion Collider. Incoherent DVCS processes, in particular the ones with tagging the internal target by measuring slow recoiling nuclei, and the unique possibility offered by positron beams for the investigation of Compton form factors of higher twist, are also briefly addressed.

scholarly journals Light-cone wavefunction representation of deeply virtual Compton scattering

2001 ◽  
Vol 596 (1-2) ◽  
pp. 99-124 ◽  
Author(s):  
Stanley J. Brodsky ◽  
Markus Diehl ◽  
Dae Sung Hwang
Keyword(s):  
Compton Scattering ◽  
Light Cone ◽  
Deeply Virtual Compton Scattering ◽  
Virtual Compton Scattering
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