Electric quadrupole and magnetic octupole moments of the light decuplet baryons within light cone QCD sum rules

ALIYEV T., AZİZİ K., SAVCI M.

PHYSICS LETTERS B, vol.681, no.3, pp.240-246, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 681 Issue: 3
  • Publication Date: 2009
  • Doi Number: 10.1016/j.physletb.2009.10.026
  • Journal Name: PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.240-246
  • Middle East Technical University Affiliated: Yes

Abstract

The electric quadrupole and magnetic octupole moments of the light decuplet baryons are calculated in the framework of the light cone QCD sum rules. The obtained non-vanishing values for the electric quadrupole and magnetic octupole moments of these baryons show nonspherical charge distribution. The sign of electric quadrupole moment is positive for Omega(-). Xi*(-), Sigma*(-) and negative for Sigma*(+), which correspond to the prolate and oblate charge distributions, respectively. A comparison of the obtained results with the predictions of non-covariant quark model which shows a good consistency between two approaches is also presented. Comparison of the obtained results on the multipole moments of the decuplet baryons containing strange quark with those of Delta baryons shows a large SU(3) flavor symmetry breaking. (C) 2009 Elsevier B.V. All rights reserved.