$K^{-}d\to \pi \Lambda N$ reaction with in-flight kaons for studying the $\Lambda N$ interaction

Abstract

The $\Lambda N$ invariant mass spectra for the reactions $K^{-}d\to {\pi }^{-}\Lambda p$ and $K^{-}d\to {\pi }^0\Lambda n$ are calculated for experimental study of isospin symmetry breaking in the $\Lambda N$ scattering at low energies, the difference in the scattering lengths and effective ranges of $\Lambda p$ and $\Lambda n$ systems. The calculations are performed for in-flight kaons with a momentum of 1000 MeV/c with employing partial wave analysis up to the p-wave for meson-baryon amplitudes and the spin-flip term for baryon-baryon amplitudes. Kinematic selection is utilized to suppress the background processes by selecting forward-emitting pions and higher momentum nucleons. It is worth noting that isospin symmetry breaking in the $\Lambda N$ system can be extracted from the difference of the $\Lambda N$ invariant mass spectra between the $K^{-}d\to {\pi }^{-}\Lambda p$ and $K^{-}d\to {\pi }^0\Lambda n$ reactions.

Comments: 15 pages, 9 figures