Moments of polarized parton distribution functions

  • V. Bernard
  • T. R. HemmertEmail author
  • U.-G. Meißner


We present novel results for the first moment of the spin-dependent structure function g 1(x,Q 2) of the nucleon at “small” (Q 2 < 0.3 GeV2) photon virtuality in the framework of a relativistic formulation of baryon chiral perturbation theory. We perform a next-to-leading order calculation and obtain significant differences to previously found results based on the heavy-baryon approach for the proton and neutron.


Distribution Function Perturbation Theory Structure Function Relativistic Formulation Photon Virtuality 
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Copyright information

© Springer-Verlag Berlin/Heidelberg 2003

Authors and Affiliations

  1. 1.U. L. Pasteur, LPTStrasbourgFrance
  2. 2.Theoretische Physik T39, Physik DepartmentTU MünchenGarchingGermany
  3. 3.FZ JülichIKP(Th)JülichGermany

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