Dipole and quadrupole polarizabilities of the pion

2008/02/07 by Fil'kov, L. V., Kashevarov, V. L.
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.0802.0965

Abstract

Data on pion polarizabilities obtained in different experiments are reviewed. The values of the dipole and quadrupole polarizabilities of the pi⁰ and pi^+- mesons found are compared with predictions of dispersion sum rules (DSRs) and two-loop calculations in the framework of chiral perturbation theory (ChPT). Possible reasons of a difference between the predictions of DSRs and ChPT are discussed.

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• Spin polarizabilities of the nucleon
• Dispersion theory of nucleon polarizabilities and outlook on chiral effective field theory
• Relation between the dipole polarizabilities of charged and neutral pions