Prospects for Spin-Parity Determination of Excited Baryons via the $\overline{\hat{\mathbf{I}}}{ž}^{+}\hat{\mathbf{I}}›{\mathbf{K}}^{-}$ Final State with PANDA

Abstract

A study of the baryon excitation spectra provides a deep insight into the inner structure of baryons. Most of the world-wide efforts have been directed towards $N^{\ast }$ and $\hat{I}{”}^{\ast }$ spectroscopy. Complementary data from double and triple strange baryon spectra are lacking and foreseen to be obtained with the PANDA experiment in the near future. Earlier Monte Carlo studies demonstrated that with an expected cross section in the order of $\hat{I}¼$b, PANDA will be able to copiously observe the channel $\bar{p}p\to \overline{\hat{I}}{ž}^{+}\hat{I}›K^{-}$, including the two resonances $\hat{I}ž{\left(1690\right)}^{-}$ and $\hat{I}ž{\left(1820\right)}^{-}$, with a negligible background contribution. In this study, the feasibility to determine the spin and parity of the $\hat{I}ž{\left(1690\right)}^{-}$ and $\hat{I}ž{\left(1820\right)}^{-}$ resonances is investigated by making use of a partial wave analysis employing the PAWIAN software. The presented results demonstrate the capability of the PANDA experiment to determine the spin-parity of these resonances with a few days of data taking.

14 pages, 9 figure, 6 tables