Sea quark-gluon effect on the magnetic octupole deformation of decuplet baryons

Abstract

The magnetic octupole moment of \(J^P= \frac{3}{2}^+\) decuplet baryons are discussed in the statistical framework, treating baryons as an ensembles of quark-gluon Fock states. The probabilities associated with multiple strange and non-strange Fock states depict the importance of sea in spin, flavor & color space, which are further merged into statistical parameters. The individual contribution of valence and sea (scalar, vector and tensor) to the magnetic octupole moment is calculated. The symmetry breaking in both sea and valence is experienced by a suppression factor \(k(1-C_l)^{n-1}\) and a mass correction parameter ’r’, respectively. The factor \(k(1-C_l)^{n-1}\) systematically reduces the probabilities of Fock states containing multiple strange quark pairs. The octupole moment value is obtained −ve for \(\Delta ^{++}, \Delta ^+, \Sigma ^{*+}\) and +ve for \(\Delta ^{-}, \Sigma ^{*-}, \Xi ^{*-}, \Omega ^-\) baryons with the domination of scalar (spin-0) sea. The computed results are compared with existing theoretical predictions, demonstrating good consistency. These predictions may serve as valuable inputs for future high-precision experiments and theoretical explorations in hadron structure.