Pion-induced production of $\Lambda (1520)$ hyperons on nuclei near threshold

Abstract

We study the pion-induced inclusive $\Lambda (1520)$ hyperon production from nuclei near threshold within a nuclear spectral function approach accounting for incoherent primary ${\pi }^{-}$ meson--proton ${\pi }^{-}p\to K^0\Lambda (1520)$ production processes. We calculate the absolute differential and total cross sections for the production of $\Lambda (1520)$ hyperons off carbon and tungsten nuclei at laboratory angles of 0${}^{\circ }$--10${}^{\circ }$, 10${}^{\circ }$--45${}^{\circ }$ and 45${}^{\circ }$--85${}^{\circ }$ by ${\pi }^{-}$ mesons with momentum of 1.7 GeV/c as well as their relative (transparency ratio) differential and integral yields from these nuclei within four scenarios for their total in-medium width. We demonstrate that these absolute observables, contrary to the relative ones, reveal some sensitivity to the $\Lambda (1520)$ in-medium width. Therefore, their measurement in a dedicated experiment at the GSI pion beam facility will allow to shed light on this width.

14 pages

References in corpus (7)

• Meson-nucleus potentials and the search for meson-nucleus bound states
• J/Psi mass shift in nuclear matter
• $J/\Psi$-nuclear bound states
• Antikaons and hyperons in nuclear matter with saturation
• Anti-strange meson-baryon interaction in hot and dense nuclear matter
• $A$ dependence of the $\gamma$- and $p$-induced production of the $\Lambda (1520)$ from nuclei
• Near-threshold ${\eta }^{\prime }$ meson production in ${\pi }^{-}A$ reactions

Cited by in corpus (2)

• Probing the structure of $X(3872)$ in photoproduction
• Medium effects in antikaon-induced ${\Xi }^{-}$ hyperon production on nuclei near threshold