Possible ${\Sigma }^{\ast }(1/2^{-})$ in the initial-state polarized $\gamma N\to K^{+}{\Sigma }^{\ast }(1385)\to K^{+}\pi \Lambda$ reaction near threshold

Abstract

By using an effective Lagrangian method, we study the effects of a newly proposed ${\Sigma }^{\ast }(1/2^{-})$ state with mass around 1380 MeV in the initial-state polarized $\gamma N\to K^{+}{\Sigma }^{\ast }(1385)\to K^{+}\pi \Lambda$ process near threshold. The theoretical predictions for the helicity cross sections ${\sigma }_{3/2}$, ${\sigma }_{1/2}$ as well as their ratios, and the angular distributions of $\pi$ in the $\pi \Lambda$ center-of-mass system are given. It is found that assuming ${\Sigma }^{\ast }(1/2^{-})$ exists or not, these physical quantities are distinctly different. So our results could be useful for the investigation of the existence of ${\Sigma }^{\ast }(1/2^{-})$ when the experimental data are available in the future.

version published in PRC, 16 pages, 5 figures, more comments added

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Cited by in corpus (9)

• Cross-channel constraints on resonant antikaon-nucleon scattering
• ${\Sigma }_{1/2^{-}}^{\ast }(1380)$ in the ${\Lambda }_c^{+}\to \eta {\pi }^{+}\Lambda$ decay
• Review of the low-lying excited baryons ${\Sigma }^{\ast }(1/2^{-})$
• Role of the possible ${\Sigma }^{\ast }({\frac{1}{2}}^{-})$ state in the $\Lambda p\to \Lambda p{\pi }^0$ reaction
• Analysis of recent CLAS data on ${\Sigma }^{\ast }(1385)$ photoproduction off a neutron target
• Role of the ${\Delta }^{\ast }(1940)$ in the ${\pi }^{+}p\to K^{+}{\Sigma }^{+}(1385)$ and $pp\to n{K}^{+}{\Sigma }^{+}(1385)$ reactions
• ${\Lambda }_c^{+}(2940)$ photoproduction off the neutron
• Observation of ${\Lambda }_c^{+}\to \Lambda a_0(980{)}^{+}$ and Evidence for $\Sigma (1380{)}^{+}$ in ${\Lambda }_c^{+}\to \Lambda {\pi }^{+}\eta$
• Role of ${\Sigma }^{\ast }(1/2^{-})$ baryons in ${\Lambda }_c\to \Lambda {\pi }^{+}{\pi }^{+}{\pi }^{-}$ decay