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

T.M Aliev,K Azizi,M Savcı

doi:10.1016/j.physletb.2009.10.026

T.M Aliev, K Azizi + Show 1 more

Open Access

https://doi.org/10.1016/j.physletb.2009.10.026

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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 Ω−, Ξ∗−, Σ∗− and negative for Σ∗+, 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 Δ baryons shows a large SU(3) flavor symmetry breaking.

Highlights

Detailed study of the electromagnetic properties of baryons, such as electromagnetic multipole moments and electromagnetic form factors, can give essential information about the nonperturbative structure of QCD
Present work is devoted to the calculation of the electric quadrupole and magnetic octupole moments of the decuplet baryons in the framework of the light cone QCD sum rules
The main difference between the present study and [11] is that, in the present work we calculate additional form factors corresponding to different kinematical structures which are related to the higher multipole moments such as quadrupole and octupole

Summary

Introduction

Detailed study of the electromagnetic properties of baryons, such as electromagnetic multipole moments and electromagnetic form factors, can give essential information about the nonperturbative structure of QCD. Present work is devoted to the calculation of the electric quadrupole and magnetic octupole moments of the decuplet baryons in the framework of the light cone QCD sum rules.

Results

Conclusion