Abstract
We obtain leading- and next-to-leading-order predictions of chiral perturbation theory for several prominent moments of nucleon structure functions. These parameter-free results turn out to be in overall agreement with the available empirical information on nearly all of the considered moments, in the region of low momentum transfer . Especially surprising is the situation for the spin polarizability , which thus far was not reproducible in chiral perturbation theory for proton and neutron simultaneously. This problem, known as the “ puzzle,” is not seen in the present calculation.
- Received 21 July 2014
DOI:https://doi.org/10.1103/PhysRevC.90.055202
©2014 American Physical Society