THE PION POLARIZABILITY FROM QCD SUM-RULES

Authors
LAVELLE MJ NASRALLAH NF SCHILCHER K
Citation
Mj. Lavelle et al., THE PION POLARIZABILITY FROM QCD SUM-RULES, Physics letters. Section B, 335(2), 1994, pp. 211-214
Citations number
15
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
335
Issue
2
Year of publication
1994
Pages
211 - 214
Database
ISI
SICI code
0370-2693(1994)335:2<211:TPPFQS>2.0.ZU;2-N
Abstract
The electromagnetic polarisability of charged pions, alpha(E), has rec ently attracted both theoretical and experimental attention. Unfortuna tely the experimental results disagree with each other. We have invest igated this polarisation via a QCD sum rule approach and find alpha(E) = 5.6 +/- 0.5 x 10(-4) fm3, which is in agreement with one experiment and disagrees with the result of chiral perturbation theory.