Nuclear effects and their interplay in nuclear deeply virtual Compton scattering amplitudes
نویسندگان
چکیده
منابع مشابه
Deeply-virtual Compton Scattering
We study in QCD the physics of deeply-virtual Compton scattering (DVCS)—the virtual Compton process in the large s and small t kinematic region. We show that DVCS can probe a new type of off-forward parton distributions. We derive an Altarelli-Parisi type of evolution equations for these distributions. We also derive their sum rules in terms of nucleon form-factors of the twist-two quark and gl...
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We propose to measure the Beam Spin Asymmetry (BSA) in Deeply Virtual Compton Scattering (DVCS) off 4He. The measurements will use a 6 GeV polarized electron beam, a 4He pressurized gas target, the CLAS and the BoNuS RTPC detectors. The major goal of this proposal is to perform the first fully quantitative investigation of the DVCS reaction off a nuclear target in the coherent and incoherent ch...
متن کاملDeeply Virtual Compton Scattering and Saturation Approach
We investigate the deeply virtual Compton scattering (DVCS) in the color dipole approach, implementing the dipole cross section through the saturation model, which interpolates successfully between soft and hard regimes. The imaginary and real part of the DVCS amplitude are obtained and the results are compared to the available data.
متن کاملDiffraction Patterns in Deeply Virtual Compton Scattering
We report on a calculation to show that the Fourier transform of the Deeply Virtual Compton Scattering (DVCS) amplitude with respect to the skewness variable ζ at fixed invariant momentum transfer squared t gives results that are analogous to the diffractive scattering of a wave in optics. As a specific example, we utilize the quantum fluctuations of a fermion state at one loop in QED to obtain...
متن کاملColour dipoles and deeply virtual Compton scattering
Why DVCS ? On the theory side, we have an explicitly proven factorisation theorem [3], valid for asymptotic Q, which expresses the amplitude as a convolution in perturbatively calculable coefficients with generalised parton distributions. A dipole analysisof DVCS is complementary to this formal QCD analysis: going beyond leading twist, we can, in principle, establish quantitatively a regime in ...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2004
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.69.015203