English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The leading order contributions of processes involving anomalous pion-photonvertices to forward spin-dependent Compton scattering from nucleons areconsidered in heavy-baryon chiral perturbation theory. These all involve theexchange of three pions between one or two photons and the nucleon, and henceare two-loop processes. We find that the sum of these processes vanishes in themanner predicted by the low energy theorem of Low, Gell-Mann and Goldberger asthe photon energy goes to zero. This provides the first consistency test oftwo-loop HBCPT.Comment: Minor typos corrected. 7 pages RevTeX, 1 eps figur

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Nothing anomalous about two-loop heavy baryon chiral perturbation theory: Consistency with the low energy theorem for spin-dependent Compton scattering