6533b826fe1ef96bd128508b
RESEARCH PRODUCT
Moments of nucleon structure functions at next-to-leading order in baryon chiral perturbation theory
Vadim LenskyJose Manuel AlarcónVladimir Pascalutsasubject
PhysicsBaryonNuclear and High Energy PhysicsParticle physicsChiral perturbation theoryProtonPolarizabilityMomentum transferOrder (ring theory)NucleonSpin-½description
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 $({Q}^{2}l0.3\phantom{\rule{4pt}{0ex}}{\mathrm{GeV}}^{2})$. Especially surprising is the situation for the spin polarizability ${\ensuremath{\delta}}_{LT}$, which thus far was not reproducible in chiral perturbation theory for proton and neutron simultaneously. This problem, known as the ``${\ensuremath{\delta}}_{LT}$ puzzle,'' is not seen in the present calculation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-11-05 | Physical Review C |