منابع مشابه
Deeply virtual Compton scattering beam spin asymmetries with CLAS
The Generalized Parton Distributions (GPDs) parameterize the non-pertubative structure of the nucleon and can be used to reveal the correlations between the momentum and position of partons in the nucleon. They appear in the amplitudes of hard-exclusive electroproduction reactions such as DVCS on the nucleon (ep → epγ). The GPD formalism can be extended to more general final states with the int...
متن کاملMeasurement of deeply virtual compton scattering beam-spin asymmetries.
The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e p-->epgamma) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (x(B) from 0.11 to 0.58, Q2 from 1 to 4.8 GeV2, -t from 0.09 to...
متن کاملTheory Aspects of Double-Spin Asymmetries in Proton-Nucleon Collisions
The study of two spin asymmetries in hadron-hadron collisions probes the details of fundamental particle interactions in ways infeasible to machines with unpolarized collisions. Within reach is how the proton spin is distributed among its constituents through ∆G and ∆q̄. Measuring couplings, furthering our understanding jet structure and uncovering new physics are all among the possibilities ava...
متن کاملSpin-orbit Correlations and Single-spin Asymmetries
In nonrelativistic quantum mechanics, Fourier transforms of the form factors yield charge distributions in the center of mass frame. In general, the concept of a center of mass has no analog in relativistic theories, and thus the position space interpretation of form factors is frame dependent. This is different in the Infinite Momentum Frame (IMF) or light-cone framework, where a Galilean subg...
متن کاملBeam normal spin asymmetry in elastic lepton-nucleon scattering
We discuss the two-photon exchange contribution to observables which involve lepton helicity flip in elastic lepton-nucleon scattering. This contribution is accessed through the spin asymmetry for a lepton beam polarized normal to the scattering plane. We estimate this beam normal spin asymmetry at large momentum transfer using a parton model and we express the corresponding amplitude in terms ...
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ژورنال
عنوان ژورنال: The European Physical Journal A
سال: 2007
ISSN: 1434-6001,1434-601X
DOI: 10.1140/epja/i2006-10422-0