6533b7d0fe1ef96bd125b5fa
RESEARCH PRODUCT
The pion polarisability from QCD sum rules
Martin LavelleK. SchilcherN.f. Nasrallahsubject
Quantum chromodynamicsPhysicsNuclear and High Energy PhysicsParticle physicsQCD sum rulesChiral perturbation theoryPionHigh Energy Physics::LatticeQuantum electrodynamicsSum rule in quantum mechanicsdescription
Abstract The electromagnetic polarisability of charged pions, α E , has recently attracted both theoretical and experimental attention. Unfortunately the experimental results disagree with each other. We have investigated this polarisation via a QCD sum rule approach and find α E = 5.6 ± 0.5 × 10 −4 fm 3 , which is in agreement with one experiment and disagrees with the result of chiral perturbation theory.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-09-01 | Physics Letters B |