Production and interaction of the eta meson with nucleons and nuclei
Wojciech Krzemien, Oleksandr Khreptak, Pawe{\l} Moskal, Iryna, Ozyrianska-Sch\"atti, Oleksandr Rundel, Magdalena Skurzok, and Marcin, Zieli\'nski (for the WASA-at-COSY collaboration)
TL;DR
This paper reviews recent experimental progress in understanding eta meson interactions with nucleons and nuclei, highlighting new data on eta production mechanisms and ongoing searches for eta-mesic nuclei.
Contribution
It presents new high-precision measurements of eta meson production and discusses the latest results in the search for eta-mesic nuclei, advancing understanding of eta-nucleon interactions.
Findings
Improved measurement of analyzing power in pp->ppeta reaction.
New insights into eta meson production mechanisms.
Updated results on eta-mesic nuclei search.
Abstract
We report on the status of the search for eta-mesic nuclei and the studies of the interaction of the eta meson with nucleons. Recently we have completed the analysis of the new WASA-at-COSY data on the production of the eta meson with polarized proton beam. New results on the analyzing power for the pp->ppeta reaction with more than an order of magnitude improved precision shed a new light on the production mechanism of the eta meson in nucleon-nucleon collisions. Also, the latest results of the search for eta-mesic nuclei are discussed.
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