Diagonal and transition magnetic moments of negative parity heavy baryons in QCD sum rules

Abstract

Diagonal and transition magnetic moments of the negative parity, spin-$1/2$ heavy baryons are studied in the framework of the light cone QCD sum rules. By constructing the sum rules for different Lorentz structures, the unwanted contributions coming from negative-to-positive (positive-to-negative) parity transitions are removed. It is obtained that the magnetic moments of all baryons, except ${\mathrm{\ensuremath{\Lambda}}}_{b}^{0}$, ${\mathrm{\ensuremath{\Sigma}}}_{c}^{+}$, and ${\mathrm{\ensuremath{\Xi}}}_{c}^{\ensuremath{'}+}$, are quite large. It is also found that the transition magnetic moments between neutral negative parity heavy ${\mathrm{\ensuremath{\Xi}}}_{Q}^{\ensuremath{'}0}$ and ${\mathrm{\ensuremath{\Xi}}}_{Q}^{0}$ baryons are very small. Magnetic moments of the ${\mathrm{\ensuremath{\Sigma}}}_{Q}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Lambda}}}_{Q}$ and ${\mathrm{\ensuremath{\Xi}}}_{Q}^{\ensuremath{'}\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Xi}}}_{Q}^{\ifmmode\pm\else\textpm\fi{}}$ transitions are quite large and may be measured in further experiments.