Structure functions and intrinsic quark orbital motion. P etr Z ávada Inst. of Physics, Prague. Introduction.
Inst. of Physics, Prague
In this talk:
[full version in arXiv: hep-ph/0609027].
Sum rules were obtained
1) Relativistic covariance
2) Spheric symmetry
3) One photon exchange
Structure functions are represented by integrals from probabilistic distributions:
Calculation - solid line, data - dashed line
(left) and circles (right)
- which followsonly from covariant kinematics!
1) Deconvolution of F2
2) Deconvolution of g1
DG=G+-G- represents subset of quarks giving net spin
contribution - opposite polarizations are canceled out. Which F2
correspond to this subset?
In this way, from F2 and g1 we obtain:
<s>, Γ1: two ways, one result
-covariant approach is a common basisSpin and orbital motion
Covariant version of QPM involving quark orbital motion was studied. New results: