English

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

Nuclear Theory 2019-10-23 v1 Nuclear Experiment

Abstract

We study the pion-induced inclusive Λ(1520)\Lambda(1520) hyperon production from nuclei near threshold within a nuclear spectral function approach accounting for incoherent primary π\pi^- meson--proton πpK0Λ(1520){\pi^-}p \to K^0\Lambda(1520) production processes. We calculate the absolute differential and total cross sections for the production of Λ(1520)\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 π\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 Λ(1520)\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.

Keywords

Cite

@article{arxiv.1910.02755,
  title  = {Pion-induced production of $\Lambda(1520)$ hyperons on nuclei near threshold},
  author = {E. Ya. Paryev and Yu. T. Kiselev},
  journal= {arXiv preprint arXiv:1910.02755},
  year   = {2019}
}

Comments

14 pages