On the exotic eikosiheptaplet

TL;DR

This paper estimates the masses and decay widths of exotic SU(3) flavor eikosiheptaplets using the chiral quark soliton model, highlighting differences in their decay behaviors and large N_c suppression effects.

Contribution

It provides the first detailed mass and width estimates for the 27-plet baryons with spin 3/2 and 1/2 within the chiral quark soliton framework, incorporating experimental inputs.

Findings

27_{3/2} has small decay widths, larger than experimental limits.

27_{1/2} exhibits large decay widths to antidecuplet, but suppressed at large N_c.

Large N_c limit suppresses certain decay channels for the 27_{1/2} state.

Abstract

We use the chiral quark soliton model to estimate masses and widths of the two eikosiheptaplets (27-plets of SU(3) flavor) of spin 3/2 and 1/2 that emerge in the rigid rotator quantization. We use as input: hyperon decays, Theta+ mass and width. While 27_{3/2} has small widths (although much larger than the values allowed by the partial wave analysis), 27_{1/2} has large decay widths to antidecuplet. However exactly for this decay channels the widths are suppressed in the large N_{c} limit.