Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-04-16
Phys.Lett.B681:240-246,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 Pages and 1 Table
Scientific paper
10.1016/j.physletb.2009.10.026
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.
Aliev Takhmassib M.
Azizi Kazem
Savci M.
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