Colour dipoles and virtual Compton scattering
نویسندگان
چکیده
منابع مشابه
Colour dipoles and virtual Compton scattering
An analysis of Deeply Virtual Compton Scattering (DVCS) is made within the colour dipole model. We compare and contrast two models for the dipole cross-section which have been successful in describing structure function data. Both models agree with the available cross section data on DVCS from HERA. We give predictions for various azimuthal angle asymmetries in HERA kinematics and for the DVCS ...
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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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...
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Virtual Compton Scattering off the proton: γ∗p → γp is a new field of investigation of nucleon structure. Several dedicated experiments have been performed at low c.m. energy and various momentum transfers, yielding specific information on the proton. This talk reviews the concept of nucleon Generalized Polarizabilities and the present experimental status. Virtual Compton Scattering (VCS) off t...
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2002
ISSN: 1434-6044,1434-6052
DOI: 10.1007/s100520100846